| In 1834, he became an apprentice of Tenmonkata and joined a calendar amendment project for the Tenpo reki (Tenpo calendar) coordinated by his father and Kagesuke SHIBUKAWA, after which he also compiled the almanac of "Shinpo Rekisho" as Rekisho (expository books about the calendar). |
天保5年（1834年）に天文方見習となり、父や渋川景佑による天保暦改暦に参加した。改暦後もその暦書である『新法暦書』の暦理撰述を行った。 |