Kansei calendar

Japanese: 寛政暦 - かんせいれき
Kansei calendar

One of the Japanese calendars. It was compiled in 1797 (Kansei 9) during the Edo period, and calendars compiled using this calendar are also called by this name. It replaced the previous Horeki calendar and was used from 1798 until the establishment of the Tenpo calendar in 1842 (Tenpo 13). By order of the shogunate, Takahashi Yoshitoki, Yamaji Tokufu, Yoshida Hidenori, Okumura Kunitoshi, and Hazama Shigetomi participated in the work. In terms of content, it adopted Kepler's theory of elliptical motion for the sun and moon based on the second part of the Chinese Rekisho Kosei, and incorporated Asada Goryu's method of rise and fall. It was a groundbreaking calendar in that it indirectly adopted the results of Western astronomy. However, the epicycle theory was used for the five planets Saturn, Jupiter, Mars, Venus, and Mercury.

[Toshio Watanabe]

[Reference] | Calendar

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

日本の暦法の一つ。江戸時代、1797年(寛政9)に編成されたもので、この暦法によって編まれた暦書もこの名でよぶ。前の宝暦(ほうれき)暦にかえて1798年より1842年(天保13)の天保(てんぽう)暦制定まで行われた。幕命により、高橋至時(よしとき)、山路徳風、吉田秀升(ひでのり)、奥村邦俊(くにとし)、間重富(はざましげとみ)らが作業に参画した。内容的には、日月に関しては中国の『暦象考成(れきしょうこうせい)』後編によってケプラーの楕円(だえん)運動説を採用し、麻田剛立(ごうりゅう)の消長法を取り入れた。間接的ではあるが西洋天文学の成果を取り入れた点で画期的な暦法である。しかし土星、木星、火星、金星、水星の5惑星に関しては周転円説であった。

[渡辺敏夫]

[参照項目] |

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