January 18, 2022

Reiwa is one of the Japanese era names. After Heisei. The 248th era since Taika. From May 1, 2019 (the first year of Reiwa), when Tokuhito (126th Emperor) took the throne, to the present. In addition, it is the second era name after Heisei as the era name based on the "Era Name Act (Act No. 43 of 1979)". The name is taken from the oldest "Manyoshu" in the Japanese poetry collection that still exists in Japan. Here, we also describe the Reiwa era in the era division of Japanese history. The following Christian eras are all Gregorian calendars unless otherwise specified.


At midnight on May 1, 2019 (the first year of Reiwa), the 125th Emperor Akihito retired based on the provisions of the "Special Law for the Emperor's Retirement, etc. (2017 Law No. 63)". Became the "Emperor", and King Tokuhito, the first boy of Akihito, became the 126th emperor. Following the succession of this throne, the yuan was changed from "Heisei" to "Reiwa" based on the provisions of the "Era Name Act" and the "Government Ordinance to Amend the Gengo (Government Ordinance No. 143 of 1991)". Was done. This is the first time in the history of constitutional politics since the Meiji era, and it is the first revision in 202 years due to the transfer of the emperor. In addition, the ceremony of Tokuhito's coronation ceremony was held on October 22, the same year. The government submitted a bill on the day when a series of ceremonies will be held only in 2019, and it was passed and passed by the House of Councilors on December 8, 2018 (Heisei 30). Due to the provisions of the Holiday Law, Golden Week 2019 will be 10 consecutive holidays from April 27th to May 6th. In addition, 2019 is a year that spans the two eras of Heisei (Heisei 31) and Reiwa (the first year of Reiwa), with the era changed at midnight on May 1. This is the first time that the Chinese character for "decree" has been used in the era. In addition, it is the first Japanese era that begins with La line in 680 years since Ryakuo (Ryakuou, Rekiou), and the two eras that have the sound of "Rei" at the beginning since the spirit turtle (Reiki) at the beginning of the Nara period. This is the first time in 1300 years. On the other hand, the Chinese character "Wa" has been used since the Showa era, with Heisei in between, and it is the 20th case since Wado for the first time in 30 years. The source of "Reiwa" is "Manyoshu" Vol. See "# authority"). As far as it can be confirmed, it was selected from Japanese classics (national books) instead of Chinese books for the first time. The pronunciation of "Reiwa" is not specified because "the Era Name Act only defines the kanji and furigana notation of the era name, and the accent is not determined."

Current Japanese calendar


On May 20, 2019, JIS X 0301 (Data elements and exchange formats for exchanging information-date and time notation) was revised, and in the date notation using the era name (extended by ISO 8601 # national standard). , "Reiwa" and "R" can be used as symbols to represent "Reiwa". As a result, JIS X 0301: 2002 became JIS X 0301: 2019. Example of notation of "January 18, 4th year of Reiwa": Year, month, and day are displayed in 2 digits each. The symbol that separates the date must use a "." (Period) (when using the Christian era, it is specified to separate with a hyphen, such as 2022-01-18). Ordinance 04.01.18 R04.01.18

Revised source

Background to the revision

It is said that Akihito, who was the emperor at that time, showed his intention to transfer on July 22, 2010 (Heisei 22), and on August 8, 2016 (Heisei 28), the Imperial Household Agency announced the day before that. Published a video message from the emperor who was 82 years old at the time. According to it, now due to his own aging.

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