diff --git a/intl/icu/source/data/locales/ast.txt b/intl/icu/source/data/locales/ast.txt
--- a/intl/icu/source/data/locales/ast.txt
+++ b/intl/icu/source/data/locales/ast.txt
@@ -1079,501 +1079,20 @@ ast{
         japanese{
             availableFormats{
                 yyyyM{"y-MM GGGGG"}
                 yyyyMEd{"E, d-M-y GGGGG"}
                 yyyyMd{"dd-MM-y GGGGG"}
             }
             eras{
                 abbreviated{
-                    0{"Taika"}
-                    1{"Hakuchi"}
-                    10{"Tenpyō"}
-                    100{"Kaō"}
-                    101{"Shōan"}
-                    102{"Angen"}
-                    103{"Jishō"}
-                    104{"Yōwa"}
-                    105{"Juei"}
-                    106{"Genryaku"}
-                    107{"Bunji"}
-                    108{"Kenkyū"}
-                    109{"Shōji"}
-                    11{"T.-kampō"}
-                    110{"Kennin"}
-                    111{"Genkyū"}
-                    112{"Ken’ei"}
-                    113{"Jōgen II"}
-                    114{"Kenryaku"}
-                    115{"Kenpō"}
-                    116{"Jōkyū"}
-                    117{"Jōō"}
-                    118{"Gennin"}
-                    119{"Karoku"}
-                    12{"T.-shōhō"}
-                    120{"Antei"}
-                    121{"Kanki"}
-                    122{"Jōei"}
-                    123{"Tenpuku"}
-                    124{"Bunryaku"}
-                    125{"Katei"}
-                    126{"Ryakunin"}
-                    127{"En’ō"}
-                    128{"Ninji"}
-                    129{"Kangen"}
-                    13{"T.-hōji"}
-                    130{"Hōji"}
-                    131{"Kenchō"}
-                    132{"Kōgen"}
-                    133{"Shōka"}
-                    134{"Shōgen"}
-                    135{"Bun’ō"}
-                    136{"Kōchō"}
-                    137{"Bun’ei"}
-                    138{"Kenji"}
-                    139{"Kōan"}
-                    14{"T.-jingo"}
-                    140{"Shōō"}
-                    141{"Einin"}
-                    142{"Shōan II"}
-                    143{"Kengen"}
-                    144{"Kagen"}
-                    145{"Tokuji"}
-                    146{"Enkyō"}
-                    147{"Ōchō"}
-                    148{"Shōwa"}
-                    149{"Bunpō"}
-                    15{"J.-keiun"}
-                    150{"Genō"}
-                    151{"Genkō"}
-                    152{"Shōchū"}
-                    153{"Karyaku"}
-                    154{"Gentoku"}
-                    155{"Genkō II"}
-                    156{"Kenmu"}
-                    157{"Engen"}
-                    158{"Kōkoku"}
-                    159{"Shōhei"}
-                    16{"Hōki"}
-                    160{"Kentoku"}
-                    161{"Bunchū"}
-                    162{"Tenju"}
-                    163{"Kōryaku"}
-                    164{"Kōwa II"}
-                    165{"Genchū"}
-                    166{"Meitoku"}
-                    167{"Kakei"}
-                    168{"Kōō"}
-                    169{"Meitoku II"}
-                    17{"Ten-ō"}
-                    170{"Ōei"}
-                    171{"Shōchō"}
-                    172{"Eikyō"}
-                    173{"Kakitsu"}
-                    174{"Bun’an"}
-                    175{"Hōtoku"}
-                    176{"Kyōtoku"}
-                    177{"Kōshō"}
-                    178{"Chōroku"}
-                    179{"Kanshō"}
-                    18{"Enryaku"}
-                    180{"Bunshō"}
-                    181{"Ōnin"}
-                    182{"Bunmei"}
-                    183{"Chōkyō"}
-                    184{"Entoku"}
-                    185{"Meiō"}
-                    186{"Bunki"}
-                    187{"Eishō II"}
-                    188{"Taiei"}
-                    189{"Kyōroku"}
-                    19{"Daidō"}
-                    190{"Tenbun"}
-                    191{"Kōji II"}
-                    192{"Eiroku"}
-                    193{"Genki"}
-                    194{"Tenshō II"}
-                    195{"Bunroku"}
-                    196{"Keichō"}
-                    197{"Genna"}
-                    198{"Kan’ei"}
-                    199{"Shōho II"}
-                    2{"Hakuhō"}
-                    20{"Kōnin"}
-                    200{"Keian"}
-                    201{"Jōō II"}
-                    202{"Meireki"}
-                    203{"Manji"}
-                    204{"Kanbun"}
-                    205{"Enpō"}
-                    206{"Tenna"}
-                    207{"Jōkyō"}
-                    208{"Genroku"}
-                    209{"Hōei"}
-                    21{"Tenchō"}
-                    210{"Shōtoku"}
-                    211{"Kyōhō"}
-                    212{"Genbun"}
-                    213{"Kanpō"}
-                    214{"Enkyō II"}
-                    215{"Kan’en"}
-                    216{"Hōreki"}
-                    217{"Meiwa"}
-                    218{"An’ei"}
-                    219{"Tenmei"}
-                    22{"Jōwa"}
-                    220{"Kansei"}
-                    221{"Kyōwa"}
-                    222{"Bunka"}
-                    223{"Bunsei"}
-                    224{"Tenpō"}
-                    225{"Kōka"}
-                    226{"Kaei"}
-                    227{"Ansei"}
-                    228{"Man’en"}
-                    229{"Bunkyū"}
-                    23{"Kajō"}
-                    230{"Genji"}
-                    231{"Keiō"}
                     234{"e. Shōwa"}
-                    24{"Ninju"}
-                    25{"Saikō"}
-                    26{"Ten-an"}
-                    27{"Jōgan"}
-                    28{"Gangyō"}
-                    29{"Ninna"}
-                    3{"Shuchō"}
-                    30{"Kanpyō"}
-                    31{"Shōtai"}
-                    32{"Engi"}
-                    33{"Enchō"}
-                    34{"Jōhei"}
-                    35{"Tengyō"}
-                    36{"Tenryaku"}
-                    37{"Tentoku"}
-                    38{"Ōwa"}
-                    39{"Kōhō"}
-                    4{"Taihō"}
-                    40{"Anna"}
-                    41{"Tenroku"}
-                    42{"Ten’en"}
-                    43{"Jōgen"}
-                    44{"Tengen"}
-                    45{"Eikan"}
-                    46{"Kanna"}
-                    47{"Eien"}
-                    48{"Eiso"}
-                    49{"Shōryaku"}
-                    5{"Keiun"}
-                    50{"Chōtoku"}
-                    51{"Chōhō"}
-                    52{"Kankō"}
-                    53{"Chōwa"}
-                    54{"Kannin"}
-                    55{"Jian"}
-                    56{"Manju"}
-                    57{"Chōgen"}
-                    58{"Chōryaku"}
-                    59{"Chōkyū"}
-                    6{"Wadō"}
-                    60{"Kantoku"}
-                    61{"Eishō"}
-                    62{"Tengi"}
-                    63{"Kōhei"}
-                    64{"Jiryaku"}
-                    65{"Enkyū"}
-                    66{"Shōho"}
-                    67{"Shōryaku II"}
-                    68{"Eihō"}
-                    69{"Ōtoku"}
-                    7{"Reiki"}
-                    70{"Kanji"}
-                    71{"Kahō"}
-                    72{"Eichō"}
-                    73{"Jōtoku"}
-                    74{"Kōwa"}
-                    75{"Chōji"}
-                    76{"Kashō"}
-                    77{"Tennin"}
-                    78{"Ten-ei"}
-                    79{"Eikyū"}
-                    8{"Yōrō"}
-                    80{"Gen’ei"}
-                    81{"Hōan"}
-                    82{"Tenji"}
-                    83{"Daiji"}
-                    84{"Tenshō"}
-                    85{"Chōshō"}
-                    86{"Hōen"}
-                    87{"Eiji"}
-                    88{"Kōji"}
-                    89{"Ten’yō"}
-                    9{"Jinki"}
-                    90{"Kyūan"}
-                    91{"Ninpei"}
-                    92{"Kyūju"}
-                    93{"Hōgen"}
-                    94{"Heiji"}
-                    95{"Eiryaku"}
-                    96{"Ōho"}
-                    97{"Chōkan"}
-                    98{"Eiman"}
-                    99{"Nin’an"}
-                }
-                narrow{
-                    0{"Taika"}
-                    10{"Tenpyō"}
-                    11{"T. kampō"}
-                    12{"T. shōhō"}
-                    13{"T. hōji"}
-                    14{"T. jingo"}
-                    25{"Saikō"}
-                    26{"Ten-an"}
-                    27{"Jōgan"}
-                    28{"Gangyō"}
-                    30{"Kanpyō"}
-                    34{"Jōhei"}
-                    36{"Tenryaku"}
-                    47{"Eien"}
-                    68{"Eihō"}
                 }
                 wide{
-                    0{"Taika (645–650)"}
-                    1{"Hakuchi (650–671)"}
-                    10{"Tenpyō (729–749)"}
-                    100{"Kaō (1169–1171)"}
-                    101{"Shōan (1171–1175)"}
-                    102{"Angen (1175–1177)"}
-                    103{"Jishō (1177–1181)"}
-                    104{"Yōwa (1181–1182)"}
-                    105{"Juei (1182–1184)"}
-                    106{"Genryaku (1184–1185)"}
-                    107{"Bunji (1185–1190)"}
-                    108{"Kenkyū (1190–1199)"}
-                    109{"Shōji (1199–1201)"}
-                    11{"Tenpyō-kampō (749-749)"}
-                    110{"Kennin (1201–1204)"}
-                    111{"Genkyū (1204–1206)"}
-                    112{"Ken’ei (1206–1207)"}
-                    113{"Jōgen (1207–1211)"}
-                    114{"Kenryaku (1211–1213)"}
-                    115{"Kenpō (1213–1219)"}
-                    116{"Jōkyū (1219–1222)"}
-                    117{"Jōō (1222–1224)"}
-                    118{"Gennin (1224–1225)"}
-                    119{"Karoku (1225–1227)"}
-                    12{"Tenpyō-shōhō (749-757)"}
-                    120{"Antei (1227–1229)"}
-                    121{"Kanki (1229–1232)"}
-                    122{"Jōei (1232–1233)"}
-                    123{"Tenpuku (1233–1234)"}
-                    124{"Bunryaku (1234–1235)"}
-                    125{"Katei (1235–1238)"}
-                    126{"Ryakunin (1238–1239)"}
-                    127{"En-ō (1239-1240)"}
-                    128{"Ninji (1240–1243)"}
-                    129{"Kangen (1243–1247)"}
-                    13{"Tenpyō-hōji (757-765)"}
-                    130{"Hōji (1247–1249)"}
-                    131{"Kenchō (1249–1256)"}
-                    132{"Kōgen (1256–1257)"}
-                    133{"Shōka (1257–1259)"}
-                    134{"Shōgen (1259–1260)"}
-                    135{"Bun’ō (1260–1261)"}
-                    136{"Kōchō (1261–1264)"}
-                    137{"Bun’ei (1264–1275)"}
-                    138{"Kenji (1275–1278)"}
-                    139{"Kōan (1278–1288)"}
-                    14{"Tenpyō-jingo (765-767)"}
-                    140{"Shōō (1288–1293)"}
-                    141{"Einin (1293–1299)"}
-                    142{"Shōan (1299–1302)"}
-                    143{"Kengen (1302–1303)"}
-                    144{"Kagen (1303–1306)"}
-                    145{"Tokuji (1306–1308)"}
-                    146{"Enkyō (1308–1311)"}
-                    147{"Ōchō (1311–1312)"}
-                    148{"Shōwa (1312–1317)"}
-                    149{"Bunpō (1317–1319)"}
-                    15{"Jingo-keiun (767-770)"}
-                    150{"Genō (1319–1321)"}
-                    151{"Genkō (1321–1324)"}
-                    152{"Shōchū (1324–1326)"}
-                    153{"Karyaku (1326–1329)"}
-                    154{"Gentoku (1329–1331)"}
-                    155{"Genkō (1331–1334)"}
-                    156{"Kenmu (1334–1336)"}
-                    157{"Engen (1336–1340)"}
-                    158{"Kōkoku (1340–1346)"}
-                    159{"Shōhei (1346–1370)"}
-                    16{"Hōki (770–780)"}
-                    160{"Kentoku (1370–1372)"}
-                    161{"Bunchū (1372–1375)"}
-                    162{"Tenju (1375–1379)"}
-                    163{"Kōryaku (1379–1381)"}
-                    164{"Kōwa (1381–1384)"}
-                    165{"Genchū (1384–1392)"}
-                    166{"Meitoku (1384–1387)"}
-                    167{"Kakei (1387–1389)"}
-                    168{"Kōō (1389–1390)"}
-                    169{"Meitoku (1390–1394)"}
-                    17{"Ten-ō (781-782)"}
-                    170{"Ōei (1394–1428)"}
-                    171{"Shōchō (1428–1429)"}
-                    172{"Eikyō (1429–1441)"}
-                    173{"Kakitsu (1441–1444)"}
-                    174{"Bun’an (1444–1449)"}
-                    175{"Hōtoku (1449–1452)"}
-                    176{"Kyōtoku (1452–1455)"}
-                    177{"Kōshō (1455–1457)"}
-                    178{"Chōroku (1457–1460)"}
-                    179{"Kanshō (1460–1466)"}
-                    18{"Enryaku (782–806)"}
-                    180{"Bunshō (1466–1467)"}
-                    181{"Ōnin (1467–1469)"}
-                    182{"Bunmei (1469–1487)"}
-                    183{"Chōkyō (1487–1489)"}
-                    184{"Entoku (1489–1492)"}
-                    185{"Meiō (1492–1501)"}
-                    186{"Bunki (1501–1504)"}
-                    187{"Eishō (1504–1521)"}
-                    188{"Taiei (1521–1528)"}
-                    189{"Kyōroku (1528–1532)"}
-                    19{"Daidō (806–810)"}
-                    190{"Tenbun (1532–1555)"}
-                    191{"Kōji (1555–1558)"}
-                    192{"Eiroku (1558–1570)"}
-                    193{"Genki (1570–1573)"}
-                    194{"Tenshō (1573–1592)"}
-                    195{"Bunroku (1592–1596)"}
-                    196{"Keichō (1596–1615)"}
-                    197{"Genna (1615–1624)"}
-                    198{"Kan’ei (1624–1644)"}
-                    199{"Shōho (1644–1648)"}
-                    2{"Hakuhō (672–686)"}
-                    20{"Kōnin (810–824)"}
-                    200{"Keian (1648–1652)"}
-                    201{"Jōō (1652–1655)"}
-                    202{"Meireki (1655–1658)"}
-                    203{"Manji (1658–1661)"}
-                    204{"Kanbun (1661–1673)"}
-                    205{"Enpō (1673–1681)"}
-                    206{"Tenna (1681–1684)"}
-                    207{"Jōkyō (1684–1688)"}
-                    208{"Genroku (1688–1704)"}
-                    209{"Hōei (1704–1711)"}
-                    21{"Tenchō (824–834)"}
-                    210{"Shōtoku (1711–1716)"}
-                    211{"Kyōhō (1716–1736)"}
-                    212{"Genbun (1736–1741)"}
-                    213{"Kanpō (1741–1744)"}
-                    214{"Enkyō (1744–1748)"}
-                    215{"Kan’en (1748–1751)"}
-                    216{"Hōreki (1751–1764)"}
-                    217{"Meiwa (1764–1772)"}
-                    218{"An’ei (1772–1781)"}
-                    219{"Tenmei (1781–1789)"}
-                    22{"Jōwa (834–848)"}
-                    220{"Kansei (1789–1801)"}
-                    221{"Kyōwa (1801–1804)"}
-                    222{"Bunka (1804–1818)"}
-                    223{"Bunsei (1818–1830)"}
-                    224{"Tenpō (1830–1844)"}
-                    225{"Kōka (1844–1848)"}
-                    226{"Kaei (1848–1854)"}
-                    227{"Ansei (1854–1860)"}
-                    228{"Man’en (1860–1861)"}
-                    229{"Bunkyū (1861–1864)"}
-                    23{"Kajō (848–851)"}
-                    230{"Genji (1864–1865)"}
-                    231{"Keiō (1865–1868)"}
                     234{"era Shōwa"}
-                    24{"Ninju (851–854)"}
-                    25{"Saikō (854–857)"}
-                    26{"Ten-an (857-859)"}
-                    27{"Jōgan (859–877)"}
-                    28{"Gangyō (877–885)"}
-                    29{"Ninna (885–889)"}
-                    3{"Shuchō (686–701)"}
-                    30{"Kanpyō (889–898)"}
-                    31{"Shōtai (898–901)"}
-                    32{"Engi (901–923)"}
-                    33{"Enchō (923–931)"}
-                    34{"Jōhei (931–938)"}
-                    35{"Tengyō (938–947)"}
-                    36{"Tenryaku (947–957)"}
-                    37{"Tentoku (957–961)"}
-                    38{"Ōwa (961–964)"}
-                    39{"Kōhō (964–968)"}
-                    4{"Taihō (701–704)"}
-                    40{"Anna (968–970)"}
-                    41{"Tenroku (970–973)"}
-                    42{"Ten’en (973–976)"}
-                    43{"Jōgen (976–978)"}
-                    44{"Tengen (978–983)"}
-                    45{"Eikan (983–985)"}
-                    46{"Kanna (985–987)"}
-                    47{"Eien (987–989)"}
-                    48{"Eiso (989–990)"}
-                    49{"Shōryaku (990–995)"}
-                    5{"Keiun (704–708)"}
-                    50{"Chōtoku (995–999)"}
-                    51{"Chōhō (999–1004)"}
-                    52{"Kankō (1004–1012)"}
-                    53{"Chōwa (1012–1017)"}
-                    54{"Kannin (1017–1021)"}
-                    55{"Jian (1021–1024)"}
-                    56{"Manju (1024–1028)"}
-                    57{"Chōgen (1028–1037)"}
-                    58{"Chōryaku (1037–1040)"}
-                    59{"Chōkyū (1040–1044)"}
-                    6{"Wadō (708–715)"}
-                    60{"Kantoku (1044–1046)"}
-                    61{"Eishō (1046–1053)"}
-                    62{"Tengi (1053–1058)"}
-                    63{"Kōhei (1058–1065)"}
-                    64{"Jiryaku (1065–1069)"}
-                    65{"Enkyū (1069–1074)"}
-                    66{"Shōho (1074–1077)"}
-                    67{"Shōryaku (1077–1081)"}
-                    68{"Eihō (1081–1084)"}
-                    69{"Ōtoku (1084–1087)"}
-                    7{"Reiki (715–717)"}
-                    70{"Kanji (1087–1094)"}
-                    71{"Kahō (1094–1096)"}
-                    72{"Eichō (1096–1097)"}
-                    73{"Jōtoku (1097–1099)"}
-                    74{"Kōwa (1099–1104)"}
-                    75{"Chōji (1104–1106)"}
-                    76{"Kashō (1106–1108)"}
-                    77{"Tennin (1108–1110)"}
-                    78{"Ten-ei (1110-1113)"}
-                    79{"Eikyū (1113–1118)"}
-                    8{"Yōrō (717–724)"}
-                    80{"Gen’ei (1118–1120)"}
-                    81{"Hōan (1120–1124)"}
-                    82{"Tenji (1124–1126)"}
-                    83{"Daiji (1126–1131)"}
-                    84{"Tenshō (1131–1132)"}
-                    85{"Chōshō (1132–1135)"}
-                    86{"Hōen (1135–1141)"}
-                    87{"Eiji (1141–1142)"}
-                    88{"Kōji (1142–1144)"}
-                    89{"Ten’yō (1144–1145)"}
-                    9{"Jinki (724–729)"}
-                    90{"Kyūan (1145–1151)"}
-                    91{"Ninpei (1151–1154)"}
-                    92{"Kyūju (1154–1156)"}
-                    93{"Hōgen (1156–1159)"}
-                    94{"Heiji (1159–1160)"}
-                    95{"Eiryaku (1160–1161)"}
-                    96{"Ōho (1161–1163)"}
-                    97{"Chōkan (1163–1165)"}
-                    98{"Eiman (1165–1166)"}
-                    99{"Nin’an (1166–1169)"}
                 }
             }
             intervalFormats{
                 yMMMd{
                     d{"d – d MMM 'de' y"}
                 }
             }
         }
diff --git a/intl/icu/source/data/locales/cs.txt b/intl/icu/source/data/locales/cs.txt
--- a/intl/icu/source/data/locales/cs.txt
+++ b/intl/icu/source/data/locales/cs.txt
@@ -1141,38 +1141,16 @@ cs{
                 "d. M. y G",
                 "dd.MM.yy GGGGG",
                 "{1} {0}",
                 "{1} {0}",
                 "{1} {0}",
                 "{1} {0}",
                 "{1} {0}",
             }
-            eras{
-                abbreviated{
-                    11{"Tenpyō-kampō (749-749)"}
-                    12{"Tenpyō-shōhō (749-757)"}
-                    13{"Tenpyō-hōji (757-765)"}
-                    14{"Tenpyō-jingo (765-767)"}
-                    15{"Jingo-keiun (767-770)"}
-                    17{"Ten-ō (781-782)"}
-                    26{"Ten-an (857-859)"}
-                    78{"Ten-ei (1110-1113)"}
-                }
-                narrow{
-                    11{"Tenpyō-kampō (749-749)"}
-                    12{"Tenpyō-shōhō (749-757)"}
-                    13{"Tenpyō-hōji (757-765)"}
-                    14{"Tenpyō-jingo (765-767)"}
-                    15{"Jingo-keiun (767-770)"}
-                    17{"Ten-ō (781-782)"}
-                    26{"Ten-an (857-859)"}
-                    78{"Ten-ei (1110-1113)"}
-                }
-            }
         }
         persian{
             monthNames{
                 format{
                     wide{
                         "farvardin",
                         "ordibehešt",
                         "chordád",
diff --git a/intl/icu/source/data/locales/he.txt b/intl/icu/source/data/locales/he.txt
--- a/intl/icu/source/data/locales/he.txt
+++ b/intl/icu/source/data/locales/he.txt
@@ -1153,25 +1153,16 @@ he{
                         "רמדאן",
                         "שוואל",
                         "ד׳ו אל־קעדה",
                         "ד׳ו אל־חיג׳ה",
                     }
                 }
             }
         }
-        japanese{
-            eras{
-                abbreviated{
-                    0{"טאיקה"}
-                    24{"נינג׳ו"}
-                    73{"שוטוקו"}
-                }
-            }
-        }
         persian{
             eras{
                 wide{
                     0{"הספירה הפרסית"}
                 }
             }
             monthNames{
                 format{
diff --git a/intl/icu/source/data/locales/hr.txt b/intl/icu/source/data/locales/hr.txt
--- a/intl/icu/source/data/locales/hr.txt
+++ b/intl/icu/source/data/locales/hr.txt
@@ -973,252 +973,16 @@ hr{
                 yMMMEd{"E, d. MMM y. GGGGG"}
                 yMMMd{"d. MMM y. GGGGG"}
                 yMd{"d. M. y. GGGGG"}
                 yQQQ{"QQQ y. GGGGG"}
                 yyyyM{"M. y. G"}
                 yyyyMEd{"E, d. M. y. G"}
                 yyyyMd{"d. M. y. G"}
             }
-            eras{
-                abbreviated{
-                    0{"Taika (645.-650.)"}
-                    1{"Hakuchi (650.-671.)"}
-                    10{"Tempyō (729.-749.)"}
-                    100{"Kaō (1169.-1171.)"}
-                    101{"Shōan (1171.-1175.)"}
-                    102{"Angen (1175.-1177.)"}
-                    103{"Jishō (1177.-1181.)"}
-                    104{"Yōwa (1181.-1182.)"}
-                    105{"Juei (1182.-1184.)"}
-                    106{"Genryuku (1184.-1185.)"}
-                    107{"Bunji (1185.-1190.)"}
-                    108{"Kenkyū (1190.-1199.)"}
-                    109{"Shōji (1199.-1201.)"}
-                    11{"Tempyō-kampō (749.-749.)"}
-                    110{"Kennin (1201.-1204.)"}
-                    111{"Genkyū (1204.-1206.)"}
-                    112{"Ken-ei (1206.-1207.)"}
-                    113{"Shōgen (1207.-1211.)"}
-                    114{"Kenryaku (1211.-1213.)"}
-                    115{"Kenpō (1213.-1219.)"}
-                    116{"Shōkyū (1219.-1222.)"}
-                    117{"Jōō (1222.-1224.)"}
-                    118{"Gennin (1224.-1225.)"}
-                    119{"Karoku (1225.-1227.)"}
-                    12{"Tempyō-shōhō (749.-757.)"}
-                    120{"Antei (1227.-1229.)"}
-                    121{"Kanki (1229.-1232.)"}
-                    122{"Jōei (1232.-1233.)"}
-                    123{"Tempuku (1233.-1234.)"}
-                    124{"Bunryaku (1234.-1235.)"}
-                    125{"Katei (1235.-1238.)"}
-                    126{"Ryakunin (1238.-1239.)"}
-                    127{"En-ō (1239.-1240.)"}
-                    128{"Ninji (1240.-1243.)"}
-                    129{"Kangen (1243.-1247.)"}
-                    13{"Tempyō-hōji (757.-765.)"}
-                    130{"Hōji (1247.-1249.)"}
-                    131{"Kenchō (1249.-1256.)"}
-                    132{"Kōgen (1256.-1257.)"}
-                    133{"Shōka (1257.-1259.)"}
-                    134{"Shōgen (1259.-1260.)"}
-                    135{"Bun-ō (1260.-1261.)"}
-                    136{"Kōchō (1261.-1264.)"}
-                    137{"Bun-ei (1264.-1275.)"}
-                    138{"Kenji (1275.-1278.)"}
-                    139{"Kōan (1278.-1288.)"}
-                    14{"Temphō-jingo (765.-767.)"}
-                    140{"Shōō (1288.-1293.)"}
-                    141{"Einin (1293.-1299.)"}
-                    142{"Shōan (1299.-1302.)"}
-                    143{"Kengen (1302.-1303.)"}
-                    144{"Kagen (1303.-1306.)"}
-                    145{"Tokuji (1306.-1308.)"}
-                    146{"Enkei (1308.-1311.)"}
-                    147{"Ōchō (1311.-1312.)"}
-                    148{"Shōwa (1312.-1317.)"}
-                    149{"Bunpō (1317.-1319.)"}
-                    15{"Jingo-keiun (767.-770.)"}
-                    150{"Genō (1319.-1321.)"}
-                    151{"Genkyō (1321.-1324.)"}
-                    152{"Shōchū (1324.-1326.)"}
-                    153{"Kareki (1326.-1329.)"}
-                    154{"Gentoku (1329.-1331.)"}
-                    155{"Genkō (1331.-1334.)"}
-                    156{"Kemmu (1334.-1336.)"}
-                    157{"Engen (1336.-1340.)"}
-                    158{"Kōkoku (1340.-1346.)"}
-                    159{"Shōhei (1346.-1370.)"}
-                    16{"Hōki (770.-780.)"}
-                    160{"Kentoku (1370.-1372.)"}
-                    161{"Bunchū (1372.-1375.)"}
-                    162{"Tenju (1375.-1379.)"}
-                    163{"Kōryaku (1379.-1381.)"}
-                    164{"Kōwa (1381.-1384.)"}
-                    165{"Genchū (1384.-1392.)"}
-                    166{"Meitoku (1384.-1387.)"}
-                    167{"Kakei (1387.-1389.)"}
-                    168{"Kōō (1389.-1390.)"}
-                    169{"Meitoku (1390.-1394.)"}
-                    17{"Ten-ō (781.-782.)"}
-                    170{"Ōei (1394.-1428.)"}
-                    171{"Shōchō (1428.-1429.)"}
-                    172{"Eikyō (1429.-1441.)"}
-                    173{"Kakitsu (1441.-1444.)"}
-                    174{"Bun-an (1444.-1449.)"}
-                    175{"Hōtoku (1449.-1452.)"}
-                    176{"Kyōtoku (1452.-1455.)"}
-                    177{"Kōshō (1455.-1457.)"}
-                    178{"Chōroku (1457.-1460.)"}
-                    179{"Kanshō (1460.-1466.)"}
-                    18{"Enryaku (782.-806.)"}
-                    180{"Bunshō (1466.-1467.)"}
-                    181{"Ōnin (1467.-1469.)"}
-                    182{"Bunmei (1469.-1487.)"}
-                    183{"Chōkyō (1487.-1489.)"}
-                    184{"Entoku (1489.-1492.)"}
-                    185{"Meiō (1492.-1501.)"}
-                    186{"Bunki (1501.-1504.)"}
-                    187{"Eishō (1504.-1521.)"}
-                    188{"Taiei (1521.-1528.)"}
-                    189{"Kyōroku (1528.-1532.)"}
-                    19{"Daidō (806.-810.)"}
-                    190{"Tenmon (1532.-1555.)"}
-                    191{"Kōji (1555.-1558.)"}
-                    192{"Eiroku (1558.-1570.)"}
-                    193{"Genki (1570.-1573.)"}
-                    194{"Tenshō (1573.-1592.)"}
-                    195{"Bunroku (1592.-1596.)"}
-                    196{"Keichō (1596.-1615.)"}
-                    197{"Genwa (1615.-1624.)"}
-                    198{"Kan-ei (1624.-1644.)"}
-                    199{"Shōho (1644.-1648.)"}
-                    2{"Hakuhō (672.-686.)"}
-                    20{"Kōnin (810.-824.)"}
-                    200{"Keian (1648.-1652.)"}
-                    201{"Shōō (1652.-1655.)"}
-                    202{"Meiryaku (1655.-1658.)"}
-                    203{"Manji (1658.-1661.)"}
-                    204{"Kanbun (1661.-1673.)"}
-                    205{"Enpō (1673.-1681.)"}
-                    206{"Tenwa (1681.-1684.)"}
-                    207{"Jōkyō (1684.-1688.)"}
-                    208{"Genroku (1688.-1704.)"}
-                    209{"Hōei (1704.-1711.)"}
-                    21{"Tenchō (824.-834.)"}
-                    210{"Shōtoku (1711.-1716.)"}
-                    211{"Kyōhō (1716.-1736.)"}
-                    212{"Genbun (1736.-1741.)"}
-                    213{"Kanpō (1741.-1744.)"}
-                    214{"Enkyō (1744.-1748.)"}
-                    215{"Kan-en (1748.-1751.)"}
-                    216{"Hōryaku (1751.-1764.)"}
-                    217{"Meiwa (1764.-1772.)"}
-                    218{"An-ei (1772.-1781.)"}
-                    219{"Tenmei (1781.-1789.)"}
-                    22{"Jōwa (834.-848.)"}
-                    220{"Kansei (1789.-1801.)"}
-                    221{"Kyōwa (1801.-1804.)"}
-                    222{"Bunka (1804.-1818.)"}
-                    223{"Bunsei (1818.-1830.)"}
-                    224{"Tenpō (1830.-1844.)"}
-                    225{"Kōka (1844.-1848.)"}
-                    226{"Kaei (1848.-1854.)"}
-                    227{"Ansei (1854.-1860.)"}
-                    228{"Man-en (1860.-1861.)"}
-                    229{"Bunkyū (1861.-1864.)"}
-                    23{"Kajō (848.-851.)"}
-                    230{"Genji (1864.-1865.)"}
-                    231{"Keiō (1865.-1868.)"}
-                    24{"Ninju (851.-854.)"}
-                    25{"Saiko (854.-857.)"}
-                    26{"Tennan (857.-859.)"}
-                    27{"Jōgan (859.-877.)"}
-                    28{"Genkei (877.-885.)"}
-                    29{"Ninna (885.-889.)"}
-                    3{"Shuchō (686.-701.)"}
-                    30{"Kampyō (889.-898.)"}
-                    31{"Shōtai (898.-901.)"}
-                    32{"Engi (901.-923.)"}
-                    33{"Enchō (923.-931.)"}
-                    34{"Shōhei (931.-938.)"}
-                    35{"Tengyō (938.-947.)"}
-                    36{"Tenryaku (947.-957.)"}
-                    37{"Tentoku (957.-961.)"}
-                    38{"Ōwa (961.-964.)"}
-                    39{"Kōhō (964.-968.)"}
-                    4{"Taihō (701.-704.)"}
-                    40{"Anna (968.-970.)"}
-                    41{"Tenroku (970.-973.)"}
-                    42{"Ten-en (973.-976.)"}
-                    43{"Jōgen (976.-978.)"}
-                    44{"Tengen (978.-983.)"}
-                    45{"Eikan (983.-985.)"}
-                    46{"Kanna (985.-987.)"}
-                    47{"Ei-en (987.-989.)"}
-                    48{"Eiso (989.-990.)"}
-                    49{"Shōryaku (990.-995.)"}
-                    5{"Keiun (704.-708.)"}
-                    50{"Chōtoku (995.-999.)"}
-                    51{"Chōhō (999.-1004.)"}
-                    52{"Kankō (1004.-1012.)"}
-                    53{"Chōwa (1012.-1017.)"}
-                    54{"Kannin (1017.-1021.)"}
-                    55{"Jian (1021.-1024.)"}
-                    56{"Manju (1024.-1028.)"}
-                    57{"Chōgen (1028.-1037.)"}
-                    58{"Chōryaku (1037.-1040.)"}
-                    59{"Chōkyū (1040.-1044.)"}
-                    6{"Wadō (708.-715.)"}
-                    60{"Kantoku (1044.-1046.)"}
-                    61{"Eishō (1046.-1053.)"}
-                    62{"Tengi (1053.-1058.)"}
-                    63{"Kōhei (1058.-1065.)"}
-                    64{"Jiryaku (1065.-1069.)"}
-                    65{"Enkyū (1069.-1074.)"}
-                    66{"Shōho (1074.-1077.)"}
-                    67{"Shōryaku (1077.-1081.)"}
-                    68{"Eiho (1081.-1084.)"}
-                    69{"Ōtoku (1084.-1087.)"}
-                    7{"Reiki (715.-717.)"}
-                    70{"Kanji (1087.-1094.)"}
-                    71{"Kaho (1094.-1096.)"}
-                    72{"Eichō (1096.-1097.)"}
-                    73{"Shōtoku (1097.-1099.)"}
-                    74{"Kōwa (1099.-1104.)"}
-                    75{"Chōji (1104.-1106.)"}
-                    76{"Kashō (1106.-1108.)"}
-                    77{"Tennin (1108.-1110.)"}
-                    78{"Ten-ei (1110.-1113.)"}
-                    79{"Eikyū (1113.-1118.)"}
-                    8{"Yōrō (717.-724.)"}
-                    80{"Gen-ei (1118.-1120.)"}
-                    81{"Hoan (1120.-1124.)"}
-                    82{"Tenji (1124.-1126.)"}
-                    83{"Daiji (1126.-1131.)"}
-                    84{"Tenshō (1131.-1132.)"}
-                    85{"Chōshō (1132.-1135.)"}
-                    86{"Hoen (1135.-1141.)"}
-                    87{"Eiji (1141.-1142.)"}
-                    88{"Kōji (1142.-1144.)"}
-                    89{"Tenyō (1144.-1145.)"}
-                    9{"Jinki (724.-729.)"}
-                    90{"Kyūan (1145.-1151.)"}
-                    91{"Ninpei (1151.-1154.)"}
-                    92{"Kyūju (1154.-1156.)"}
-                    93{"Hogen (1156.-1159.)"}
-                    94{"Heiji (1159.-1160.)"}
-                    95{"Eiryaku (1160.-1161.)"}
-                    96{"Ōho (1161.-1163.)"}
-                    97{"Chōkan (1163.-1165.)"}
-                    98{"Eiman (1165.-1166.)"}
-                    99{"Nin-an (1166.-1169.)"}
-                }
-            }
         }
         persian{
             monthNames{
                 stand-alone{
                     narrow{
                         "1.",
                         "2.",
                         "3.",
diff --git a/intl/icu/source/data/locales/id.txt b/intl/icu/source/data/locales/id.txt
--- a/intl/icu/source/data/locales/id.txt
+++ b/intl/icu/source/data/locales/id.txt
@@ -1094,67 +1094,16 @@ id{
                 "HHmmssz",
                 "HHmmss",
                 "HHmm",
                 "GyMMMMEEEEdd",
                 "GyMMMMd",
                 "GyMMMd",
                 "GGGGGyMd",
             }
-            eras{
-                abbreviated{
-                    10{"Tempyō (729–749)"}
-                    106{"Genryuku (1184–1185)"}
-                    11{"Tempyō-kampō (749-749)"}
-                    112{"Ken-ei (1206-1207)"}
-                    113{"Shōgen (1207–1211)"}
-                    116{"Shōkyū (1219–1222)"}
-                    12{"Tempyō-shōhō (749-757)"}
-                    123{"Tempuku (1233–1234)"}
-                    127{"En-ō (1239-1240)"}
-                    13{"Tempyō-hōji (757-765)"}
-                    135{"Bun-ō (1260-1261)"}
-                    137{"Bun-ei (1264-1275)"}
-                    14{"Temphō-jingo (765-767)"}
-                    146{"Enkei (1308–1311)"}
-                    15{"Jingo-keiun (767-770)"}
-                    151{"Genkyō (1321–1324)"}
-                    153{"Kareki (1326–1329)"}
-                    156{"Kemmu (1334–1336)"}
-                    17{"Ten-ō (781-782)"}
-                    174{"Bun-an (1444-1449)"}
-                    190{"Tenmon (1532–1555)"}
-                    197{"Genwa (1615–1624)"}
-                    198{"Kan-ei (1624-1644)"}
-                    201{"Shōō (1652–1655)"}
-                    202{"Meiryaku (1655–1658)"}
-                    206{"Tenwa (1681–1684)"}
-                    215{"Kan-en (1748-1751)"}
-                    216{"Hōryaku (1751–1764)"}
-                    218{"An-ei (1772-1781)"}
-                    228{"Man-en (1860-1861)"}
-                    25{"Saiko (854–857)"}
-                    26{"Tennan (857–859)"}
-                    28{"Genkei (877–885)"}
-                    30{"Kampyō (889–898)"}
-                    34{"Shōhei (931–938)"}
-                    42{"Ten-en (973-976)"}
-                    47{"Ei-en (987-989)"}
-                    68{"Eiho (1081–1084)"}
-                    71{"Kaho (1094–1096)"}
-                    73{"Shōtoku (1097–1099)"}
-                    78{"Ten-ei (1110-1113)"}
-                    80{"Gen-ei (1118-1120)"}
-                    81{"Hoan (1120–1124)"}
-                    86{"Hoen (1135–1141)"}
-                    89{"Tenyō (1144–1145)"}
-                    93{"Hogen (1156–1159)"}
-                    99{"Nin-an (1166-1169)"}
-                }
-            }
         }
         roc{
             DateTimePatterns{
                 "HH.mm.ss zzzz",
                 "HH.mm.ss z",
                 "HH.mm.ss",
                 "HH.mm",
                 "EEEE, dd MMMM y G",
diff --git a/intl/icu/source/data/locales/lo.txt b/intl/icu/source/data/locales/lo.txt
--- a/intl/icu/source/data/locales/lo.txt
+++ b/intl/icu/source/data/locales/lo.txt
@@ -1220,252 +1220,20 @@ lo{
                         "ຊຸລຫິຈ",
                     }
                 }
             }
         }
         japanese{
             eras{
                 abbreviated{
-                    0{"ທະອິກະ (645–650)"}
-                    1{"ຮາກູຊິ (650–671)"}
-                    10{"ເທັມປຽວ (729–749)"}
-                    100{"ກະໂອ (1169–1171)"}
-                    101{"ໂຊະອານ (1171–1175)"}
-                    102{"ອານເຄັນ (1175–1177)"}
-                    103{"ຈິໂຊະ (1177–1181)"}
-                    104{"ໂຢະວະ (1181–1182)"}
-                    105{"ຈຸເອະ (1182–1184)"}
-                    106{"ເຄັນເຣຢຸກິ (1184–1185)"}
-                    107{"ບັນຈິ (1185–1190)"}
-                    108{"ເກັນຄິວ (1190–1199)"}
-                    109{"ໂຊຈິ (1199–1201)"}
-                    11{"ເທັມປຽວ-ຄໍາໂປ (749–749)"}
-                    110{"ເກັນນິນ (1201–1204)"}
-                    111{"ເຄັນກິວ (1204–1206)"}
-                    112{"ເກັນ-ເອະ (1206–1207)"}
-                    113{"ໂຊະເຄັນ (1207–1211)"}
-                    114{"ເກັນເຣຢະກຸ (1211–1213)"}
-                    115{"ເກັນໂປະ (1213–1219)"}
-                    116{"ໂຊະກິວ (1219–1222)"}
-                    117{"ໂຈະໂອະ (1222–1224)"}
-                    118{"ເຄັນນິນ (1224–1225)"}
-                    119{"ກາໂຮກຸ (1225–1227)"}
-                    12{"ເທັມປຽວ-ໂຊໂຮ (749–757)"}
-                    120{"ອານເຕະ (1227–1229)"}
-                    121{"ການກິ (1229–1232)"}
-                    122{"ໂຈະເອະ (1232–1233)"}
-                    123{"ເທັມປຸກຸ (1233–1234)"}
-                    124{"ບັນເຣຢະກຸ (1234–1235)"}
-                    125{"ກາເຕະ (1235–1238)"}
-                    126{"ເຣຢະກຸນິນ (1238–1239)"}
-                    127{"ເອັນ-ໂອ (1239–1240)"}
-                    128{"ນິນຈີ (1240–1243)"}
-                    129{"ຄານເຈນ (1243–1247)"}
-                    13{"ເທັມປຽວ-ໂຮຈິ (757–765)"}
-                    130{"ໂຫຈີ (1247–1249)"}
-                    131{"ເຄນໂຊ (1249–1256)"}
-                    132{"ໂຄເຈນ (1256–1257)"}
-                    133{"ໂຊກາ (1257–1259)"}
-                    134{"ໂຊເກນ (1259–1260)"}
-                    135{"ບຸນ-ໂອ (1260–1261)"}
-                    136{"ໂຄໂຊ (1261–1264)"}
-                    137{"ບຸນ-ອີ (1264–1275)"}
-                    138{"ເຄນຈີ (1275–1278)"}
-                    139{"ເຄິນ (1278–1288)"}
-                    14{"ເທັມປຽວ-ຈິງໂງະ (765–767)"}
-                    140{"ໂຊ (1288–1293)"}
-                    141{"ອິນນິນ (1293–1299)"}
-                    142{"ເຊີນ (1299–1302)"}
-                    143{"ເຄນເຈນ (1302–1303)"}
-                    144{"ຄາເຈນ (1303–1306)"}
-                    145{"ໂຕກູຈິ (1306–1308)"}
-                    146{"ອິນກິ (1308–1311)"}
-                    147{"ໂອໂຊ (1300–1312)"}
-                    148{"ໂຊວາ (1312–1317)"}
-                    149{"ບຸນໂປ (1317–1319)"}
-                    15{"ຈິງໂງະ-ເຄອຸງ (767–770)"}
-                    150{"ຈີໂນ (1319–1321)"}
-                    151{"ເຈນກຽວ (1321–1324)"}
-                    152{"ໂຊຊິ (1324–1326)"}
-                    153{"ຄາຣາກິ (1326–1329)"}
-                    154{"ເຈນໂຕກູ (1329–1331)"}
-                    155{"ເຈນໂກ (1331–1334)"}
-                    156{"ເກັມມຸ (1334–1336)"}
-                    157{"ເອັນເຈັນ (1336–1340)"}
-                    158{"ໂກໂກກຸ (1340–1346)"}
-                    159{"ໂຊຊິ (1346–1370)"}
-                    16{"ໂຮກິ (770–780)"}
-                    160{"ເຄນໂຕກຸ (1370–1372)"}
-                    161{"ບຸນຊຸ (1372–1375)"}
-                    162{"ເທັນຈຸ (1375–1379)"}
-                    163{"ຄໍຢາກຸ (1379–1381)"}
-                    164{"ໂກວາ (1381–1384)"}
-                    165{"ເຈັນຊຸ (1384–1392)"}
-                    166{"ມີໂຕກຸ (1384–1387)"}
-                    167{"ກາກິ (1387–1389)"}
-                    168{"ຄູ (1389–1390)"}
-                    169{"ມິໂຕກຸ (1390–1394)"}
-                    17{"ເທັນ-ໂອ (781–782)"}
-                    170{"ໂອອິ (1394–1428)"}
-                    171{"ໂຊໂຊ (1428–1429)"}
-                    172{"ອິກຽວ (1429–1441)"}
-                    173{"ກາກິຊຸ (1441–1444)"}
-                    174{"ບຸນ-ອານ (1444–1449)"}
-                    175{"ໂຫໂຕກຸ (1449–1452)"}
-                    176{"ກຽວໂຕກຸ (1452–1455)"}
-                    177{"ເກໂຊ (1455–1457)"}
-                    178{"ໂຊໂຣກຸ (1457–1460)"}
-                    179{"ຄານໂຊ (1460–1466)"}
-                    18{"ເອັນຣຢາກຸ (782–806)"}
-                    180{"ບຸນໂຊ (1466–1467)"}
-                    181{"ໂອນິນ (1467–1469)"}
-                    182{"ບຸນມິ (1469–1487)"}
-                    183{"ໂຊກຽວ (1487–1489)"}
-                    184{"ເອັນໂຕກຸ (1489–1492)"}
-                    185{"ມິໂອ (1492–1501)"}
-                    186{"ບຸນກິ (1501–1504)"}
-                    187{"ອິໂຊ (1504–1521)"}
-                    188{"ໄຕອິ (1521–1528)"}
-                    189{"ກຽວໂຣກຸ (1528–1532)"}
-                    19{"ດາອິໂດ (806–810)"}
-                    190{"ເທັນມອນ (1532–1555)"}
-                    191{"ໂກຈິ (1555–1558)"}
-                    192{"ອິໂຣກຸ (1558–1570)"}
-                    193{"ເຈັນກິ (1570–1573)"}
-                    194{"ເທັນໂຊ (1573–1592)"}
-                    195{"ບຸນໂຣກຸ (1592–1596)"}
-                    196{"ຄິໂຊ (1596–1615)"}
-                    197{"ເກັນວາ (1615–1624)"}
-                    198{"ຄານ-ອິ (1624–1644)"}
-                    199{"ໂຊໂຊ (1644–1648)"}
-                    2{"ຮາກູໂຮ (672–686)"}
-                    20{"ໂກນິນ (810–824)"}
-                    200{"ຄຽນ (1648–1652)"}
-                    201{"ຊຸ (1652–1655)"}
-                    202{"ເມຍຢາກຸ (1655–1658)"}
-                    203{"ແມນຈິ (1658–1661)"}
-                    204{"ການບຸນ (1661–1673)"}
-                    205{"ເອັນໂປ (1673–1681)"}
-                    206{"ເທັນວາ (1681–1684)"}
-                    207{"ໂຈກຽວ (1684–1688)"}
-                    208{"ເຈັນໂຣກຸ (1688–1704)"}
-                    209{"ໂຫອິ (1704–1711)"}
-                    21{"ເທັນໂຊ (824–834)"}
-                    210{"ຊຸຕຸກຸ (1711–1716)"}
-                    211{"ກຽວຫຸ (1716–1736)"}
-                    212{"ເຈັນບຸນ (1736–1741)"}
-                    213{"ຄານໂປ (1741–1744)"}
-                    214{"ເອັນກຽວ (1744–1748)"}
-                    215{"ຄານ-ອິນ (1748–1751)"}
-                    216{"ໂຫຢາກຸ (1751–1764)"}
-                    217{"ເມຍວາ (1764–1772)"}
-                    218{"ເອັນ-ອິ (1772–1781)"}
-                    219{"ເທັນມິ (1781–1789)"}
-                    22{"ໂຊວະ (834–848)"}
-                    220{"ຄານຊິ (1789–1801)"}
-                    221{"ກຽວວາ (1801–1804)"}
-                    222{"ບຸນກາ (1804–1818)"}
-                    223{"ບຸນຊິ (1818–1830)"}
-                    224{"ເທັນໂປ (1830–1844)"}
-                    225{"ກຸກາ (1844–1848)"}
-                    226{"ກາອິ (1848–1854)"}
-                    227{"ແອັນຊິ (1854–1860)"}
-                    228{"ແມັນ-ເອັນ (1860–1861)"}
-                    229{"ບຸນກຸ (1861–1864)"}
-                    23{"ກະໂຈ (848–851)"}
-                    230{"ເຈນຈີ (1864–1865)"}
-                    231{"ຄີໂອ (1865–1868)"}
                     232{"ມີຈີ"}
                     233{"ໄຕໂຊ"}
                     234{"ໂຊວາ"}
                     235{"ຮີຊີ"}
-                    24{"ນິນຈູ (851–854)"}
-                    25{"ສະອິໂກະ (854–857)"}
-                    26{"ເທັນນານ (857–859)"}
-                    27{"ໂຈງານ (859–877)"}
-                    28{"ເກັນເກ (877–885)"}
-                    29{"ນິນນາ (885–889)"}
-                    3{"ຊູໂຊ (686–701)"}
-                    30{"ກໍາປຽວ (889–898)"}
-                    31{"ໂຊຕາອິ (898–901)"}
-                    32{"ເອັນງິ (901–923)"}
-                    33{"ເອັນໂຊ (923–931)"}
-                    34{"ໂຊເຮ (931–938)"}
-                    35{"ເທັນງຽວ (938–947)"}
-                    36{"ເທັນຣຢາກູ (947–957)"}
-                    37{"ເທັນໂຕະກຸ (957–961)"}
-                    38{"ໂອວະ (961–964)"}
-                    39{"ໂກໂຮ (964–968)"}
-                    4{"ທາອິໂຮ (701–704)"}
-                    40{"ອານະ (968–970)"}
-                    41{"ເທັນໂຣະກຸ (970–973)"}
-                    42{"ເທັນ-ເອັນ (973–976)"}
-                    43{"ໂຈເງັນ (976–978)"}
-                    44{"ເທັນເງັນ (978–983)"}
-                    45{"ເອການ (983–985)"}
-                    46{"ການນະ (985–987)"}
-                    47{"ເອ-ເອັນ (987–989)"}
-                    48{"ເອໂຊ (989–990)"}
-                    49{"ໂຊຣຢະກຸ (990–995)"}
-                    5{"ເຄອຸງ (704–708)"}
-                    50{"ໂຊໂຕະກຸ (995–999)"}
-                    51{"ໂຊໂຮ (999–1004)"}
-                    52{"ການໂກ (1004–1012)"}
-                    53{"ໂຊຫວະ (1012–1017)"}
-                    54{"ການນິງ (1017–1021)"}
-                    55{"ຈິອານ (1021–1024)"}
-                    56{"ມານຈຸ (1024–1028)"}
-                    57{"ໂຊເງັນ (1028–1037)"}
-                    58{"ໂຊເຣຢະກຸ (1037–1040)"}
-                    59{"ໂຊຄິວ (1040–1044)"}
-                    6{"ວະໂດ (708–715)"}
-                    60{"ການໂຕະກຸ (1044–1046)"}
-                    61{"ເອະໂຊ (1046–1053)"}
-                    62{"ເທັນງິ (1053–1058)"}
-                    63{"ໂກເຮ (1058–1065)"}
-                    64{"ຈິເຣຢະກຸ (1065–1069)"}
-                    65{"ເອັນຄິວ (1069–1074)"}
-                    66{"ໂຊະໂຮ (1074–1077)"}
-                    67{"ໂຊະເຣຢະກຸ (1077–1081)"}
-                    68{"ເອໂຊະ (1081–1084)"}
-                    69{"ໂອໂຕະກຸ (1084–1087)"}
-                    7{"ເຣອິກິ (715–717)"}
-                    70{"ການຈິ (1087–1094)"}
-                    71{"ກາໂຊ (1094–1096)"}
-                    72{"ເອະໂຊະ (1096–1097)"}
-                    73{"ໂຊະໂຕະກຸ (1097–1099)"}
-                    74{"ໂກະວະ (1099–1104)"}
-                    75{"ໂຊະຈິ (1104–1106)"}
-                    76{"ກາໂຊະ (1106–1108)"}
-                    77{"ເທັນນິນ (1108–1110)"}
-                    78{"ເທັນ-ອິ (1110–1113)"}
-                    79{"ເອກິວ (1113–1118)"}
-                    8{"ໂຢໂຣ (717–724)"}
-                    80{"ເຄັນ-ເອ (1118–1120)"}
-                    81{"ໂຮະອານ (1120–1124)"}
-                    82{"ເທັນຈິ (1124–1126)"}
-                    83{"ດາອິຈິ (1126–1131)"}
-                    84{"ເທັນໂຊະ (1131–1132)"}
-                    85{"ໂຊະໂຊະ (1132–1135)"}
-                    86{"ໂຮເອັນ (1135–1141)"}
-                    87{"ເອຈິ (1141–1142)"}
-                    88{"ໂກະຈິ (1142–1144)"}
-                    89{"ເທັນໂຢະ (1144–1145)"}
-                    9{"ຈິງກິ (724–729)"}
-                    90{"ຄິວອານ (1145–1151)"}
-                    91{"ນິນເປ (1151–1154)"}
-                    92{"ຄິວຈຸ (1154–1156)"}
-                    93{"ໂຮເຄັນ (1156–1159)"}
-                    94{"ເຮຈິ (1159–1160)"}
-                    95{"ເອເຣຢະກຸ (1160–1161)"}
-                    96{"ໂອໂຊ (1161–1163)"}
-                    97{"ໂຊະການ (1163–1165)"}
-                    98{"ເອມານ (1165–1166)"}
-                    99{"ນິນ-ອານ (1166–1169)"}
                 }
             }
         }
         persian{
             eras{
                 abbreviated{
                     0{"ປີເປີເຊຍ"}
                 }
diff --git a/intl/icu/source/data/locales/lt.txt b/intl/icu/source/data/locales/lt.txt
--- a/intl/icu/source/data/locales/lt.txt
+++ b/intl/icu/source/data/locales/lt.txt
@@ -830,202 +830,19 @@ lt{
                         "IV ketv.",
                     }
                 }
             }
         }
         japanese{
             eras{
                 abbreviated{
-                    1{"Hakuči (650–671)"}
-                    10{"Tempio (729–749)"}
-                    100{"Kao (1169–1171)"}
-                    101{"Šoan (1171–1175)"}
-                    103{"Džišo (1177–1181)"}
-                    104{"Jova (1181–1182)"}
-                    105{"Džuei (1182–1184)"}
-                    106{"Genrjuku (1184–1185)"}
-                    107{"Bundži (1185–1190)"}
-                    108{"Kenkju (1190–1199)"}
-                    109{"Šodži (1199–1201)"}
-                    11{"Tempio-kampo (749–749)"}
-                    110{"Kenin (1201–1204)"}
-                    111{"Genkju (1204–1206)"}
-                    112{"Ken-ei (1206–1207)"}
-                    113{"Šogen (1207–1211)"}
-                    114{"Kenrjaku (1211–1213)"}
-                    115{"Kenpo (1213–1219)"}
-                    116{"Šokju (1219–1222)"}
-                    117{"Džu (1222–1224)"}
-                    118{"Genin (1224–1225)"}
-                    12{"Tempio-šoho (749–757)"}
-                    122{"Džoei (1232–1233)"}
-                    123{"Tempuku (1233–1234)"}
-                    124{"Bunrjaku (1234–1235)"}
-                    126{"Rjakunin (1238–1239)"}
-                    127{"En-o (1239–1240)"}
-                    128{"Nindži (1240–1243)"}
-                    13{"Tempio-hodzi (757–765)"}
-                    130{"Hodži (1247–1249)"}
-                    131{"Kenčo (1249–1256)"}
-                    132{"Kogen (1256–1257)"}
-                    133{"Šoka (1257–1259)"}
-                    134{"Šogen (1259–1260)"}
-                    135{"Bun-o (1260–1261)"}
-                    136{"Kočo (1261–1264)"}
-                    137{"Bun-ei (1264–1275)"}
-                    138{"Kendži (1275–1278)"}
-                    139{"Koan (1278–1288)"}
-                    14{"Tempo-dzingo (765–767)"}
-                    140{"Šu (1288–1293)"}
-                    142{"Šoan (1299–1302)"}
-                    145{"Tokudži (1306–1308)"}
-                    146{"Enkei (1308–1311)"}
-                    147{"Očo (1311–1312)"}
-                    148{"Šova (1312–1317)"}
-                    149{"Bunpo (1317–1319)"}
-                    15{"Dzingo-keiun (767–770)"}
-                    150{"Dženo (1319–1321)"}
-                    151{"Dženkjo (1321–1324)"}
-                    152{"Šoču (1324–1326)"}
-                    153{"Kareki (1326–1329)"}
-                    155{"Genko (1331–1334)"}
-                    156{"Kemu (1334–1336)"}
-                    158{"Kokoku (1340–1346)"}
-                    159{"Šohei (1346–1370)"}
-                    16{"Hoki (770–780)"}
-                    161{"Bunču (1372–1375)"}
-                    162{"Tendžu (1375–1379)"}
-                    163{"Korjaku (1379–1381)"}
-                    164{"Kova (1381–1384)"}
-                    165{"Genču (1384–1392)"}
-                    168{"Ku (1389–1390)"}
-                    17{"Ten-o (781–782)"}
-                    170{"Oei (1394–1428)"}
-                    171{"Šočo (1428–1429)"}
-                    172{"Eikjo (1429–1441)"}
-                    174{"Bun-an (1444–1449)"}
-                    175{"Hotoku (1449–1452)"}
-                    176{"Kjotoku (1452–1455)"}
-                    177{"Košo (1455–1457)"}
-                    178{"Čoroku (1457–1460)"}
-                    179{"Kanšo (1460–1466)"}
-                    18{"Enrjaku (782–806)"}
-                    180{"Bunšo (1466–1467)"}
-                    181{"Onin (1467–1469)"}
-                    183{"Čokjo (1487–1489)"}
-                    185{"Meio (1492–1501)"}
-                    187{"Eišo (1504–1521)"}
-                    189{"Kjoroku (1528–1532)"}
-                    19{"Daido (806–810)"}
-                    190{"Tenmon (1532–1555)"}
-                    191{"Kodži (1555–1558)"}
-                    194{"Tenšo (1573–1592)"}
-                    196{"Keičo (1596–1615)"}
-                    197{"Genva (1615–1624)"}
-                    198{"Kan-ei (1624–1644)"}
-                    199{"Šoho (1644–1648)"}
-                    2{"Hakuho (672–686)"}
-                    20{"Konin (810–824)"}
-                    201{"Šu (1652–1655)"}
-                    202{"Meirjaku (1655–1658)"}
-                    203{"Mandži (1658–1661)"}
-                    205{"Enpo (1673–1681)"}
-                    206{"Tenva (1681–1684)"}
-                    207{"Džokjo (1684–1688)"}
-                    209{"Hoei (1704–1711)"}
-                    21{"Tenčo (824–834)"}
-                    210{"Šotoku (1711–1716)"}
-                    211{"Kjoho (1716–1736)"}
-                    213{"Kanpo (1741–1744)"}
-                    214{"Enkjo (1744–1748)"}
-                    215{"Kan-en (1748–1751)"}
-                    216{"Horjaku (1751–1764)"}
-                    217{"Meiva (1764–1772)"}
-                    218{"An-ei (1772–1781)"}
-                    22{"Šova (834–848)"}
-                    221{"Kjova (1801–1804)"}
-                    224{"Tenpo (1830–1844)"}
-                    225{"Koka (1844–1848)"}
-                    228{"Man-en (1860–1861)"}
-                    229{"Bunkju (1861–1864)"}
-                    23{"Kajo (848–851)"}
-                    230{"Gendži (1864–1865)"}
-                    231{"Keiko (1865–1868)"}
                     232{"Meidži"}
                     233{"Taišo"}
                     234{"Šova"}
-                    25{"Saiko (854–857)"}
-                    26{"Tenan (857–859)"}
-                    27{"Jogan (859–877)"}
-                    28{"Genkei (877–885)"}
-                    29{"Ninja (885–889)"}
-                    3{"Šučo (686–701)"}
-                    30{"Kampjo (889–898)"}
-                    31{"Šotai (898–901)"}
-                    33{"Enčo (923–931)"}
-                    34{"Šohei (931–938)"}
-                    35{"Tengjo (938–947)"}
-                    36{"Tenriaku (947–957)"}
-                    38{"Ova (961–964)"}
-                    39{"Koho (964–968)"}
-                    4{"Taiho (701–704)"}
-                    40{"Ana (968–970)"}
-                    42{"Ten-en (973–976)"}
-                    43{"Jogen (976–978)"}
-                    46{"Kana (985–987)"}
-                    47{"Ei-en (987–989)"}
-                    49{"Šorjaku (990–995)"}
-                    50{"Čotoku (995–999)"}
-                    51{"Čoho (999–1004)"}
-                    52{"Kanko (1004–1012)"}
-                    53{"Čova (1012–1017)"}
-                    54{"Kanin (1017–1021)"}
-                    55{"Džian (1021–1024)"}
-                    56{"Mandžiu (1024–1028)"}
-                    57{"Čogen (1028–1037)"}
-                    58{"Čorjaku (1037–1040)"}
-                    59{"Čokju (1040–1044)"}
-                    6{"Vado (708–715)"}
-                    61{"Eišo (1046–1053)"}
-                    63{"Kohei (1058–1065)"}
-                    64{"Džirjaku (1065–1069)"}
-                    65{"Enkju (1069–1074)"}
-                    66{"Šoho (1074–1077)"}
-                    67{"Šorjaku (1077–1081)"}
-                    68{"Eiho (1081–084)"}
-                    69{"Otoku (1084–1087)"}
-                    70{"Kandži (1087–1094)"}
-                    71{"Kaho (1094–1096)"}
-                    72{"Eičo (1096–1097)"}
-                    73{"Šotoku (1097–1099)"}
-                    74{"Kova (1099–1104)"}
-                    75{"Čodži (1104–1106)"}
-                    76{"Kašo (1106–1108)"}
-                    77{"Tenin (1108–1110)"}
-                    79{"Eikju (1113–1118)"}
-                    8{"Joro (717–724)"}
-                    80{"Gen-ei (1118–1120)"}
-                    81{"Hoan (1120–1124)"}
-                    82{"Tendži (1124–1126)"}
-                    83{"Daidži (1126–1131)"}
-                    84{"Tenšo (1131–1132)"}
-                    85{"Čošo (1132–1135)"}
-                    86{"Hoen (1135–1141)"}
-                    87{"Eidži (1141–1142)"}
-                    88{"Kodži (1142–1144)"}
-                    89{"Tenjo (1144–1145)"}
-                    90{"Kjuan (1145–1151)"}
-                    92{"Kjuju (1154–1156)"}
-                    93{"Hogen (1156–1159)"}
-                    94{"Heidži (1159–1160)"}
-                    95{"Eirjaku (1160–1161)"}
-                    96{"Oho (1161–1163)"}
-                    97{"Čokan (1163–1165)"}
-                    99{"Nin-an (1166–1169)"}
                 }
             }
         }
         roc{
             eras{
                 abbreviated{
                     0{"Prieš R.O.C."}
                 }
diff --git a/intl/icu/source/data/locales/nl.txt b/intl/icu/source/data/locales/nl.txt
--- a/intl/icu/source/data/locales/nl.txt
+++ b/intl/icu/source/data/locales/nl.txt
@@ -1409,67 +1409,16 @@ nl{
                 "d MMM y G",
                 "dd-MM-yy GGGGG",
                 "{1} {0}",
                 "{1} {0}",
                 "{1} {0}",
                 "{1} {0}",
                 "{1} {0}",
             }
-            eras{
-                abbreviated{
-                    11{"Tenpyō-kampō (749-749)"}
-                    112{"Ken-ei (1206-1207)"}
-                    113{"Shōgen (1207–1211)"}
-                    116{"Shōkyū (1219–1222)"}
-                    12{"Tenpyō-shōhō (749-757)"}
-                    123{"Tempuku (1233–1234)"}
-                    127{"En-ō (1239-1240)"}
-                    13{"Tenpyō-hōji (757-765)"}
-                    135{"Bun-ō (1260-1261)"}
-                    137{"Bun-ei (1264-1275)"}
-                    14{"Tenpyō-jingo (765-767)"}
-                    146{"Enkei (1308–1311)"}
-                    15{"Jingo-keiun (767-770)"}
-                    151{"Genkyō (1321–1324)"}
-                    153{"Kareki (1326–1329)"}
-                    156{"Kemmu (1334–1336)"}
-                    17{"Ten-ō (781-782)"}
-                    174{"Bun-an (1444-1449)"}
-                    190{"Tenmon (1532–1555)"}
-                    197{"Genwa (1615–1624)"}
-                    198{"Kan-ei (1624-1644)"}
-                    201{"Shōō (1652–1655)"}
-                    202{"Meiryaku (1655–1658)"}
-                    206{"Tenwa (1681–1684)"}
-                    215{"Kan-en (1748-1751)"}
-                    216{"Hōryaku (1751–1764)"}
-                    218{"An-ei (1772-1781)"}
-                    228{"Man-en (1860-1861)"}
-                    26{"Ten-an (857-859)"}
-                    71{"Kaho (1094–1096)"}
-                    73{"Shōtoku (1097–1099)"}
-                    78{"Ten-ei (1110-1113)"}
-                    80{"Gen-ei (1118-1120)"}
-                    81{"Hoan (1120–1124)"}
-                    86{"Hoen (1135–1141)"}
-                    93{"Hogen (1156–1159)"}
-                }
-                narrow{
-                    11{"Tenpyō-kampō (749-749)"}
-                    12{"Tenpyō-shōhō (749-757)"}
-                    14{"Tenpyō-jingo (765-767)"}
-                    146{"Enkei (1308–1311)"}
-                    15{"Jingo-keiun (767-770)"}
-                    153{"Kareki (1326–1329)"}
-                    17{"Ten-ō (781-782)"}
-                    214{"Enkei (1744–1748)"}
-                    26{"Ten-an (857-859)"}
-                }
-            }
         }
         persian{
             DateTimePatterns{
                 "HH:mm:ss zzzz",
                 "HH:mm:ss z",
                 "HH:mm:ss",
                 "HH:mm",
                 "EEEE d MMMM y G",
diff --git a/intl/icu/source/data/locales/no.txt b/intl/icu/source/data/locales/no.txt
--- a/intl/icu/source/data/locales/no.txt
+++ b/intl/icu/source/data/locales/no.txt
@@ -1706,28 +1706,16 @@ no{
                 "d. MMM y G",
                 "d.M y G",
                 "{1} {0}",
                 "{1} {0}",
                 "{1} {0}",
                 "{1} {0}",
                 "{1} {0}",
             }
-            eras{
-                abbreviated{
-                    11{"Tenpyō-kampō (749-749)"}
-                    12{"Tenpyō-shōhō (749-757)"}
-                    13{"Tenpyō-hōji (757-765)"}
-                    14{"Tenpyō-jingo (765-767)"}
-                    15{"Jingo-keiun (767-770)"}
-                    17{"Ten-ō (781-782)"}
-                    26{"Ten-an (857-859)"}
-                    78{"Ten-ei (1110-1113)"}
-                }
-            }
             intervalFormats{
                 h{
                     a{"h a–h a"}
                 }
                 hv{
                     a{"h a–h a v"}
                 }
             }
diff --git a/intl/icu/source/data/locales/sv.txt b/intl/icu/source/data/locales/sv.txt
--- a/intl/icu/source/data/locales/sv.txt
+++ b/intl/icu/source/data/locales/sv.txt
@@ -1222,64 +1222,16 @@ sv{
                         "Shawwal",
                         "Dhu-l-ga’da",
                         "Dhu-l-hijja",
                     }
                 }
             }
         }
         japanese{
-            eras{
-                abbreviated{
-                    10{"Tempyō (729–749)"}
-                    106{"Genryuku (1184–1185)"}
-                    11{"Tempyō-kampō (749–749)"}
-                    112{"Ken-ei (1206–1207)"}
-                    113{"Shōgen (1207–1211)"}
-                    116{"Shōkyū (1219–1222)"}
-                    12{"Tempyō-shōhō (749–757)"}
-                    123{"Tempuku (1233–1234)"}
-                    127{"En-ō (1239–1240)"}
-                    13{"Tempyō-hōji (757–765)"}
-                    135{"Bun-ō (1260–1261)"}
-                    137{"Bun-ei (1264–1275)"}
-                    14{"Temphō-jingo (765–767)"}
-                    146{"Enkei (1308–1311)"}
-                    151{"Genkyō (1321–1324)"}
-                    153{"Kareki (1326–1329)"}
-                    156{"Kemmu (1334–1336)"}
-                    174{"Bun-an (1444–1449)"}
-                    190{"Tenmon (1532–1555)"}
-                    197{"Genwa (1615–1624)"}
-                    198{"Kan-ei (1624–1644)"}
-                    201{"Shōō (1652–1655)"}
-                    202{"Meiryaku (1655–1658)"}
-                    206{"Tenwa (1681–1684)"}
-                    215{"Kan-en (1748–1751)"}
-                    216{"Hōryaku (1751–1764)"}
-                    218{"An-ei (1772–1781)"}
-                    228{"Man-en (1860–1861)"}
-                    25{"Saiko (854–857)"}
-                    26{"Tennan (857–859)"}
-                    28{"Genkei (877–885)"}
-                    30{"Kampyō (889–898)"}
-                    34{"Shōhei (931–938)"}
-                    42{"Ten-en (973–976)"}
-                    47{"Ei-en (987–989)"}
-                    68{"Eiho (1081–1084)"}
-                    71{"Kaho (1094–1096)"}
-                    73{"Shōtoku (1097–1099)"}
-                    80{"Gen-ei (1118–1120)"}
-                    81{"Hoan (1120–1124)"}
-                    86{"Hoen (1135–1141)"}
-                    89{"Tenyō (1144–1145)"}
-                    93{"Hogen (1156–1159)"}
-                    99{"Nin-an (1166–1169)"}
-                }
-            }
             intervalFormats{
                 Bh{
                     B{"h B – h B"}
                 }
                 Bhm{
                     B{"h:mm B – h:mm B"}
                 }
             }
