Adachi family

…After the implementation of the Jōkyō calendar in 1685 (Jōkyō 2), the astronomical part of the calendar became the job of the Edo Tenmonkata, and the Kamo family, i.e. the Kōtokui family, was only in charge of the calendar notes. Since Shibukawa Shunkai was the first Japanese to create the Jōkyō calendar, the Edo Tenmonkata came to play a major role in calendar creation, and by the end of the Edo period, eight families had been appointed to this Tenmonkata, including the Shibukawa family, the Ikai family, the Yamaji family, the Nishikawa family, the Yoshida family, the Okumura family, the Takahashi family, and the Adachi family. However, some of them only stayed for one generation, and only three families, the Shibukawa family, the Yamaji family, and the Adachi family, continued to exist until the start of the Meiji era. …

*Some of the terminology that refers to the Adachi family is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…1685年(貞享2)貞享暦が施行されて後は暦の天文学的部分は江戸の天文方の仕事となり，賀茂家，すなわち幸徳井家は暦注部分のみを担当するようになった。　渋川春海が日本人として初めて貞享暦を作って以来，江戸の天文方が作暦に主要の地位を占めるようになったが，この天文方には渋川家のほか，幕末までに猪飼家，山路家，西川家，吉田家，奥村家，高橋家，足立家の計8家が任命された。しかし一代限りの者もあって明治に変わるまで存続していたのは渋川家，山路家，足立家の3家であった。…

※「足立家」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報