Career
He is the author of Seiyō sampō (Essence of Mathematics) which was published in 1781. Sadasuke was the father of Fujita Kagen (1765–1821), who is credited with publishing the first collection of sangaku problems.
藤田 定資
He is the author of Seiyō sampō (Essence of Mathematics) which was published in 1781. Sadasuke was the father of Fujita Kagen (1765–1821), who is credited with publishing the first collection of sangaku problems.