Kambei Mori

Kambei Mori, also known as Mori Shigeyoshi, was a Japanese mathematician of the Edo period. Some older sources suggest that he studied in China, but historians regard those claims as inconclusive or reject them. What is known with certainty is that he started a school in Kyoto and wrote several influential and much discussed books on arithmetic and the use of the abacus, among them the division manual Warisansho. One of his students was Yoshida Mitsuyoshi, the author of the Jinkoki, the oldest surviving Japanese mathematical text. His place in the history of Japanese mathematics rests on that teaching and on the books that carried abacus arithmetic to a wide readership.