割算: 7 Terms and Phrases
- 著書『割算書』(通称)は、『算用記』と共に江戸時代初期を代表する貴重な和算書である。
- His book 'Warizan sho' (The Book of Division) (popular name) was the most valuable Wasansho in the early Edo period with 'Sanyo-ki' (the Calculation Manual).
- 元和 8年（1622年）に刊行された毛利重能の『割算書』の中で同書が難解であると批判したと思しき記述が見られることから同書よりも古いとされる。
- 'Warizan sho' (The Book of Division) by Shigeyoshi MORI published in 1622 has a description which seems to criticize 'Sanyo-ki' as being too difficult to understand, so the latter should be older than the former.
- 『割算書』の奥付には、「摂津国武庫郡瓦林から京都へ移り住み、“割算の天下一”という名（割算天下一指南の看板）の下に塾を開いた」と書かれている。
- In the colophon of 'Wsansho,' it is written that 'Shigeyoshi MORI moved from Kawarabayashi, Mukonokori, Settsu Province to Kyoto, and established the school under the name of 'the Master of Division'' (the sign said this is the school of Master of Division).
- 日常の計算を電卓の普及まで担い続けたそろばんは、いつ導入されたかは不明であるが、毛利重能の『割算書』（1622年、元和８年）ではそろばんを用いた計算が解説されている。
- Although it is not known when the abacus, used for everyday calculations until the time the electronic calculator became widely used, was introduced to Japan, there is an explanation of the method of calculating using an abacus in 'Warizan sho' (the Book of Division) written by Shigeyoshi MORI in 1622.
