Japanese Era Converter

Convert Japanese era dates and Gregorian calendar dates with day-level precision. It also supports extended convenience notation such as Showa 100, plus boundary days, romanized names, and an era-to-Gregorian table.

Convert an era date

Japanese Era to Gregorian

Search and choose an era in one field by kanji, kana reading, or romanization. Enter 1 for the first year. Extended post-era notation such as Showa 100 can also be converted.

Gregorian to Japanese Era

Enter a Gregorian date to find the active Japanese era and era year. You can also change the output era to display the same date as Showa, Heisei, or another extended era notation.

Result -
Era boundary note
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Zodiac
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Supported range
From Taika, June 19, 645

Era Milestone List

For the Gregorian input, the tool lists every ended era as a large 100-year extended milestone, including historical eras before Meiji.

Japanese Era List and Gregorian Table

The table covers modern and historical eras. For older historical dates, confirm the primary source used by your project because calendar treatment can vary by reference.

Era Reading Romanization Start End
Reiwa Reiwa Reiwa 2019-05-01 Present
Heisei Heisei Heisei 1989-01-08 2019-04-30
Showa Showa Showa 1926-12-25 1989-01-07
Taisho Taisho Taisho 1912-07-30 1926-12-24
Meiji Meiji Meiji 1868-01-25 1912-07-29
Keio Keio Keio 1865-04-07 1868-01-24
Genji Genji Genji 1864-02-20 1865-04-06
Bunkyu Bunkyu Bunkyu 1861-02-19 1864-02-19
Manen Manen Manen 1860-03-18 1861-02-18
Ansei Ansei Ansei 1854-11-27 1860-03-17
Kaei Kaei Kaei 1848-02-28 1854-11-26
Koka Koka Koka 1844-12-02 1848-02-27
Tenpo Tenpo Tenpo 1830-12-10 1844-12-01
Bunsei Bunsei Bunsei 1818-04-22 1830-12-09
Bunka Bunka Bunka 1804-02-11 1818-04-21
Kyowa Kyowa Kyowa 1801-02-05 1804-02-10
Kansei Kansei Kansei 1789-01-25 1801-02-04
Tenmei Tenmei Tenmei 1781-04-02 1789-01-24
Anei Anei Anei 1772-11-16 1781-04-01
Meiwa Meiwa Meiwa 1764-06-02 1772-11-15
Horeki Horeki Horeki 1751-10-27 1764-06-01
Kanen Kanen Kanen 1748-07-12 1751-10-26
Enkyo Enkyo Enkyo 1744-02-21 1748-07-11
Kanpo Kanpo Kanpo 1741-02-27 1744-02-20
Genbun Genbun Genbun 1736-04-28 1741-02-26
Kyoho Kyoho Kyoho 1716-06-22 1736-04-27
Shotoku Shotoku Shotoku 1711-04-25 1716-06-21
Hoei Hoei Hoei 1704-03-13 1711-04-24
Genroku Genroku Genroku 1688-09-30 1704-03-12
Jokyo Jokyo Jokyo 1684-02-21 1688-09-29
Tenna Tenna Tenna 1681-09-29 1684-02-20
Enpo Enpo Enpo 1673-09-21 1681-09-28
Kanbun Kanbun Kanbun 1661-04-23 1673-09-20
Manji Manji Manji 1658-07-23 1661-04-22
Meireki Meireki Meireki 1655-04-13 1658-07-22
Joo Joo Joo 1652-09-18 1655-04-12
Keian Keian Keian 1648-02-15 1652-09-17
Shoho Shoho Shoho 1644-12-16 1648-02-14
Kanei Kanei Kanei 1624-02-29 1644-12-15
Genna Genna Genna 1615-07-13 1624-02-28
Keicho Keicho Keicho 1596-10-27 1615-07-12
Bunroku Bunroku Bunroku 1592-12-08 1596-10-26
Tensho Tensho Tensho 1573-07-28 1592-12-07
Genki Genki Genki 1570-04-23 1573-07-27
Eiroku Eiroku Eiroku 1558-02-28 1570-04-22
Koji Koji Koji 1555-10-23 1558-02-27
Tenbun Tenbun Tenbun 1532-07-29 1555-10-22
Kyoroku Kyoroku Kyoroku 1528-08-20 1532-07-28
Taiei Taiei Taiei 1521-08-23 1528-08-19
Eisho Eisho Eisho 1504-02-29 1521-08-22
Bunki Bunki Bunki 1501-02-29 1504-02-28
Meio Meio Meio 1492-07-19 1501-02-28
Entoku Entoku Entoku 1489-07-21 1492-07-18
Chokyo Chokyo Chokyo 1487-07-20 1489-07-20
Bunmei Bunmei Bunmei 1469-04-28 1487-07-19
Onin Onin Onin 1467-03-05 1469-04-27
Bunsho Bunsho Bunsho 1466-02-28 1467-03-04
Kansho Kansho Kansho 1460-12-21 1466-02-27
Choroku Choroku Choroku 1457-09-28 1460-12-20
Kosho Kosho Kosho 1455-07-25 1457-09-27
Kyotoku Kyotoku Kyotoku 1452-07-25 1455-07-24
Hotoku Hotoku Hotoku 1449-07-28 1452-07-24
Bunan Bunan Bunan 1444-02-05 1449-07-27
Kakitsu Kakitsu Kakitsu 1441-02-17 1444-02-04
Eikyo Eikyo Eikyo 1429-09-05 1441-02-16
Shocho Shocho Shocho 1428-04-27 1429-09-04
Oei Oei Oei 1394-07-05 1428-04-26
Meitoku Meitoku Meitoku 1390-03-26 1394-07-04
Koo Koo Koo 1389-02-09 1390-03-25
Kakei Kakei Kakei 1387-08-23 1389-02-08
Shitoku Shitoku Shitoku 1384-02-27 1387-08-22
Eitoku Eitoku Eitoku 1381-02-24 1384-02-26
Koryaku Koryaku Koryaku 1379-03-22 1381-02-23
Eiwa Eiwa Eiwa 1375-02-27 1379-03-21
Oan Oan Oan 1368-02-18 1375-02-26
Joji Joji Joji 1362-09-23 1368-02-17
Koan Koan Koan 1361-03-29 1362-09-22
Enbun Enbun Enbun 1356-03-28 1361-03-28
Bunna Bunna Bunna 1352-09-27 1356-03-27
Kanno Kanno Kanno 1350-02-27 1352-09-26
Jowa Jowa Jowa 1345-10-21 1350-02-26
Koei Koei Koei 1342-04-27 1345-10-20
Ryakuo Ryakuo Ryakuo 1338-08-28 1342-04-26
Kenmu Kenmu Kenmu 1334-01-29 1336-02-29
Shokei Shokei Shokei 1332-04-28 1334-01-28
Gentoku Gentoku Gentoku 1329-08-29 1331-08-09
Karyaku Karyaku Karyaku 1326-04-26 1329-08-28
Shochu Shochu Shochu 1324-12-09 1326-04-25
Genko Genko Genko 1321-02-23 1324-12-08
Geno Geno Geno 1319-04-28 1321-02-22
Bunpo Bunpo Bunpo 1317-02-03 1319-04-27
Showa Showa Showa 1312-03-20 1317-02-02
Ocho Ocho Ocho 1311-04-28 1312-03-19
Enkyo Enkyo Enkyo 1308-10-09 1311-04-27
Tokuji Tokuji Tokuji 1306-12-14 1308-10-08
Kagen Kagen Kagen 1303-08-05 1306-12-13
Kengen Kengen Kengen 1302-11-21 1303-08-04
Shoan Shoan Shoan 1299-04-25 1302-11-20
Einin Einin Einin 1293-08-06 1299-04-24
Shoo Shoo Shoo 1288-04-28 1293-08-05
Koan Koan Koan 1278-02-29 1288-04-27
Kenji Kenji Kenji 1275-04-25 1278-02-28
Bunei Bunei Bunei 1264-02-28 1275-04-24
Kocho Kocho Kocho 1261-02-20 1264-02-27
Buno Buno Buno 1260-04-13 1261-02-19
Shogen Shogen Shogen 1259-03-26 1260-04-12
Shoka Shoka Shoka 1257-03-14 1259-03-25
Kogen Kogen Kogen 1256-10-05 1257-03-13
Kencho Kencho Kencho 1249-03-18 1256-10-04
Hoji Hoji Hoji 1247-02-28 1249-03-17
Kangen Kangen Kangen 1243-02-26 1247-02-27
Ninji Ninji Ninji 1240-07-16 1243-02-25
Eno Eno Eno 1239-02-07 1240-07-15
Ryakunin Ryakunin Ryakunin 1238-11-23 1239-02-06
Katei Katei Katei 1235-09-19 1238-11-22
Bunryaku Bunryaku Bunryaku 1234-11-05 1235-09-18
Tenpuku Tenpuku Tenpuku 1233-04-15 1234-11-04
Joei Joei Joei 1232-04-02 1233-04-14
Kanki Kanki Kanki 1229-03-05 1232-04-01
Antei Antei Antei 1227-12-10 1229-03-04
Karoku Karoku Karoku 1225-04-20 1227-12-09
Gennin Gennin Gennin 1224-11-20 1225-04-19
Joo Joo Joo 1222-04-13 1224-11-19
Jokyu Jokyu Jokyu 1219-04-12 1222-04-12
Kenpo Kenpo Kenpo 1213-12-06 1219-04-11
Kenryaku Kenryaku Kenryaku 1211-03-09 1213-12-05
Jogen Jogen Jogen 1207-10-25 1211-03-08
Kenei Kenei Kenei 1206-04-27 1207-10-24
Genkyu Genkyu Genkyu 1204-02-20 1206-04-26
Kennin Kennin Kennin 1201-02-13 1204-02-19
Shoji Shoji Shoji 1199-04-27 1201-02-12
Kenkyu Kenkyu Kenkyu 1190-04-11 1199-04-26
Bunji Bunji Bunji 1185-08-14 1190-04-10
Genryaku Genryaku Genryaku 1184-04-16 1185-08-13
Juei Juei Juei 1182-05-27 1184-04-15
Yowa Yowa Yowa 1181-07-14 1182-05-26
Jisho Jisho Jisho 1177-08-04 1181-07-13
Angen Angen Angen 1175-07-28 1177-08-03
Joan Joan Joan 1171-04-21 1175-07-27
Kao Kao Kao 1169-04-08 1171-04-20
Ninan Ninan Ninan 1166-08-27 1169-04-07
Eiman Eiman Eiman 1165-06-05 1166-08-26
Chokan Chokan Chokan 1163-03-29 1165-06-04
Oho Oho Oho 1161-09-04 1163-03-28
Eiryaku Eiryaku Eiryaku 1160-01-10 1161-09-03
Heiji Heiji Heiji 1159-04-20 1160-01-09
Hogen Hogen Hogen 1156-04-27 1159-04-19
Kyuju Kyuju Kyuju 1154-10-28 1156-04-26
Ninpei Ninpei Ninpei 1151-01-26 1154-10-27
Kyuan Kyuan Kyuan 1145-07-22 1151-01-25
Tenyo Tenyo Tenyo 1144-02-23 1145-07-21
Koji Koji Koji 1142-04-28 1144-02-22
Eiji Eiji Eiji 1141-07-10 1142-04-27
Hoen Hoen Hoen 1135-04-27 1141-07-09
Chosho Chosho Chosho 1132-08-11 1135-04-26
Tensho Tensho Tensho 1131-01-29 1132-08-10
Daiji Daiji Daiji 1126-01-22 1131-01-28
Tenji Tenji Tenji 1124-04-03 1126-01-21
Hoan Hoan Hoan 1120-04-10 1124-04-02
Genei Genei Genei 1118-04-03 1120-04-09
Eikyu Eikyu Eikyu 1113-07-13 1118-04-02
Tenei Tenei Tenei 1110-07-13 1113-07-12
Tennin Tennin Tennin 1108-08-03 1110-07-12
Kasho Kasho Kasho 1106-04-09 1108-08-02
Choji Choji Choji 1104-02-10 1106-04-08
Kowa Kowa Kowa 1099-08-28 1104-02-09
Jotoku Jotoku Jotoku 1097-11-21 1099-08-27
Eicho Eicho Eicho 1096-12-17 1097-11-20
Kaho Kaho Kaho 1094-12-15 1096-12-16
Kanji Kanji Kanji 1087-04-07 1094-12-14
Otoku Otoku Otoku 1084-02-07 1087-04-06
Eiho Eiho Eiho 1081-02-10 1084-02-06
Joryaku Joryaku Joryaku 1077-11-17 1081-02-09
Joho Joho Joho 1074-08-23 1077-11-16
Enkyu Enkyu Enkyu 1069-04-13 1074-08-22
Jiryaku Jiryaku Jiryaku 1065-08-02 1069-04-12
Kohei Kohei Kohei 1058-08-29 1065-08-01
Tenki Tenki Tenki 1053-01-11 1058-08-28
Eisho Eisho Eisho 1046-04-14 1053-01-10
Kantoku Kantoku Kantoku 1044-11-24 1046-04-13
Chokyu Chokyu Chokyu 1040-11-10 1044-11-23
Choryaku Choryaku Choryaku 1037-04-21 1040-11-09
Chogen Chogen Chogen 1028-07-25 1037-04-20
Manju Manju Manju 1024-07-13 1028-07-24
Jian Jian Jian 1021-02-02 1024-07-12
Kannin Kannin Kannin 1017-04-23 1021-02-01
Chowa Chowa Chowa 1012-12-25 1017-04-22
Kanko Kanko Kanko 1004-07-20 1012-12-24
Choho Choho Choho 999-01-13 1004-07-19
Chotoku Chotoku Chotoku 995-02-22 999-01-12
Shoryaku Shoryaku Shoryaku 990-11-07 995-02-21
Eiso Eiso Eiso 989-08-08 990-11-06
Eien Eien Eien 987-04-05 989-08-07
Kanna Kanna Kanna 985-04-27 987-04-04
Eikan Eikan Eikan 983-04-15 985-04-26
Tengen Tengen Tengen 978-11-29 983-04-14
Jogen Jogen Jogen 976-07-13 978-11-28
Tenen Tenen Tenen 973-12-20 976-07-12
Tenroku Tenroku Tenroku 970-03-25 973-12-19
Anna Anna Anna 968-08-13 970-03-24
Koho Koho Koho 964-07-10 968-08-12
Owa Owa Owa 961-02-16 964-07-09
Tentoku Tentoku Tentoku 957-10-27 961-02-15
Tenryaku Tenryaku Tenryaku 947-04-22 957-10-26
Tengyo Tengyo Tengyo 938-05-22 947-04-21
Johei Johei Johei 931-04-26 938-05-21
Encho Encho Encho 923-04-11 931-04-25
Engi Engi Engi 901-07-15 923-04-10
Shotai Shotai Shotai 898-04-26 901-07-14
Kanpyo Kanpyo Kanpyo 889-04-27 898-04-25
Ninna Ninna Ninna 885-02-21 889-04-26
Gangyo Gangyo Gangyo 877-04-16 885-02-20
Jogan Jogan Jogan 859-04-15 877-04-15
Tenan Tenan Tenan 857-02-21 859-04-14
Saiko Saiko Saiko 854-11-30 857-02-20
Ninju Ninju Ninju 851-04-28 854-11-29
Kasho Kasho Kasho 848-06-13 851-04-27
Jowa Jowa Jowa 834-01-03 848-06-12
Tencho Tencho Tencho 824-01-05 834-01-02
Konin Konin Konin 810-09-19 824-01-04
Daido Daido Daido 806-05-18 810-09-18
Enryaku Enryaku Enryaku 782-08-19 806-05-17
Teno Teno Teno 781-01-01 782-08-18
Hoki Hoki Hoki 770-10-01 780-12-31
Jingokeiun Jingokeiun Jingokeiun 767-08-16 770-09-30
Tenpyojingo Tenpyojingo Tenpyojingo 765-01-07 767-08-15
Tenpyohoji Tenpyohoji Tenpyohoji 757-08-18 765-01-06
Tenpyoshoho Tenpyoshoho Tenpyoshoho 749-04-14 757-08-17
Tenpyokanpo Tenpyokanpo Tenpyokanpo 749-04-01 749-04-13
Tenpyo Tenpyo Tenpyo 729-08-05 749-03-31
Jinki Jinki Jinki 724-02-04 729-08-04
Yoro Yoro Yoro 717-11-17 724-02-03
Reiki Reiki Reiki 715-09-02 717-11-16
Wado Wado Wado 708-01-11 715-09-01
Keiun Keiun Keiun 704-05-10 708-01-10
Taiho Taiho Taiho 701-03-21 704-05-09
Shucho Shucho Shucho 686-07-20 686-09-30
Hakuchi Hakuchi Hakuchi 650-02-15 654-10-10
Taika Taika Taika 645-06-19 650-02-14

Era conversion depends on the exact day.

Japanese era conversion is not just a year offset. An era can begin in the middle of a Gregorian year: Reiwa began on May 1, 2019, Heisei on January 8, 1989, and Showa on December 25, 1926. If you only remember that 2019 is Reiwa 1, you may incorrectly label April 30, 2019. This converter asks for the full year, month, and day so the boundary is handled explicitly.

First year and boundary days

The first year of an era is written with the traditional first-year notation in Japanese. For input, the converter accepts 1; for display, it uses the correct localized notation. In Gregorian-to-era mode, the tool compares adjacent dates to flag the first day of an era or the last day before an era change.

Extended notation such as Showa 100

Expressions such as Showa 100 or Heisei 37 are not official era dates, but they are common in anniversary, cultural, search, and conversational contexts. This page treats them as extended notation counted from the era start year. For official documents, the era that was actually valid on the date should still be used, so Gregorian-to-era mode keeps the official result visible while allowing the output era label to be changed.

Historical eras before Meiji

Modern forms usually need Reiwa, Heisei, Showa, Taisho, and Meiji. Historical timelines and archival material may need older era names, so this page uses the existing era list from Taika onward. Older dates can vary by calendar system and source convention, so research or legal publication should still verify the primary source.

Why include the era table

Search intent around Japanese era conversion overlaps with era lists, chronological order, Gregorian tables, and romanized names. Keeping the converter and table together lets visitors confirm spelling, reading, start date, end date, and result without leaving the page.

Implementation notes for spreadsheets and systems

For spreadsheets and databases, decide whether you only support modern eras or historical eras. Store the canonical date as a Gregorian date whenever possible, then render Japanese era notation at display time. Era year alone is not enough to resolve boundary dates.

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