The Hōryaku calendar (宝暦暦, Hōryaku-reki) was a Japanese lunisolar calendar (genka reki).[1] It was also known as Hōryaku Kōjutsu Gen-reki (宝暦甲戌元暦). It was published in 1755.[2]
The Hōryaku Kōjutsu Genreki system was the work of Abe Yasukuni,[3] Shibukawa Kōkyō,[4] and Nishiyama Seikyū.[5] Errors in the calendar were corrected in 1798[6] and in 1844.[7] In 1872, the Western calendar was adopted.[3]
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