Yoshida Mitsuyoshi (吉田 光由; 1598 – January 8, 1672), also known as Yoshida Kōyū, was a Japanese mathematician in the Edo period. His popular and widely disseminated published work made him the most well known writer about mathematics in his lifetime.
He was a student of Kambei Mori (also known as Mōri Shigeyoshi). Along with Imamura Chishō and Takahara Kisshu, Yoshida became known to his contemporaries as one of "the Three Arithmeticians."
Yoshida was the author of the oldest extant Japanese mathematical text. The 1627 work was named Jinkōki. The work dealt with the subject of soroban arithmetic, including square and cube root operations.
Selected works
In a statistical overview derived from writings by and about Yoshida Mitsuyoshi, OCLC/WorldCat encompasses roughly 20+ works in 30+ publications in 1 language and 40+ library holdings.
1643 — Jinkōki (塵劫記), OCLC 22023455088
1659 — Shinpen Jinkōki (新編塵劫記), OCLC 22057549632
1818 — Sanpō chiedakara (筭法智惠寳), OCLC 22057124215
1850 — Chikamichi Jinkōki (近道塵劫記), OCLC 22055982082