was a Japanese mathematician and historian of Japanese mathematics. He was born in Tokushima, Japan..
He was the founder of the Tohoku Mathematical Journal..
References
Further reading
External links The Extremal Chords of an Oval, by TSURUICHI HAYASHI, Sendai. A Remark on the integral Equation solved by Mr. Hirakawa, by TSURUICHI HAYASHI in Sendai.