It is said that it was based on the idea of Shinyu kakumei (a prediction of revolution in Kanototori of the Chinese astrological calendar) in isho (Chinese books which describe predictions and others), that is, a revolution to change the dynasty would occur in the first Kanototori year considering 60 years as one cycle (元) and 1260 years of 21 cycles as one period (蔀), in accordance with the note from Zheng Xuan, '天道不遠 三五而反 六甲爲一元 四六二六交相乗 七元有三變 三七相乗 廿一元爲一蔀 合千三百廿年,' in "Yi wei" which was cited in 'kakumeikanmon' (in zatsubu (overall section) in the 26th section of "Gunsho ruiju"(Collection of historical documents compiled by Hokiichi HANAWA)) by Kiyoyuki MIYOSHI.
三善清行による「革命勘文」（『群書類従』　第貮拾六輯雜部　所収）で引用された『易緯』での鄭玄の注「天道不遠三五而反六甲爲一元四六二六交相乗七元有三變　三七相乗廿一元爲一蔀合千三百廿年」から一元60年、二十一元1260年を一蔀とし、そのはじめの辛酉の年に王朝交代という革命が起こるとするいわゆる緯書での辛酉革命の思想によるという。