Koshikakurei - Koshikakurei

According to the theory of divination, the year of Jiazi (the year of the four seasons of the year Kinoene) that occurs once every 60 years is a lucky year for political change. In the Book of Changes, it is called Jiazi Reformation, and in the Book of Shi, it is called Jiazi Reformation. In Japan, the earliest example of this was Prince Shotoku's establishment of the Seventeen Articles of the Constitution and the implementation of the Twelve Ranks of Caps in 604 (the 12th year of the reign of Empress Suiko) and the implementation of the Twelve Ranks of Caps and Ranks system. The Twenty-six Ranks of Caps and Ranks system in 664 (the 3rd year of the reign of Emperor Tenchi) and the accession to the throne and change of era name in 724 (the 1st year of the Jinki era) of Emperor Shomu could also be considered examples of the Jiazi Reformation. From 964 (the 1st year of the Kōhō era) to the end of the Edo period, except for 1564 (the 7th year of the Eiroku era), the era name was changed to avoid such disasters.

[Yoshiaki Okada]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

讖緯(しんい)説で、60年に一度の甲子(きのえね)の年は政治上の変革が起こる運にあたるという思想。『易緯(えきい)』では甲子革令とし、『詩緯(しい)』では甲子革政とする。日本では604年（推古天皇12）に聖徳太子が憲法十七条を制定し、冠位十二階を実施したのがもっとも早い対応例で、664年（天智天皇3）の冠位二十六階や724年（神亀1）の聖武(しょうむ)天皇即位と改元も甲子革令の例といえよう。964年（康保1）からは1564年（永禄7）を除き、幕末まで改元して、その厄災を避けるのが例となった。

［岡田芳朗］

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