Kiyosi Itô, Japanese mathematician and academic (d. 2008)
Kiyosi Itô (伊藤 清, Itō Kiyoshi, Japanese pronunciation: [itoː ki̥joꜜɕi̥], September 7, 1915 – 10 November 2008) was a Japanese mathematician who made fundamental contributions to Probability theory, in particular, the theory of stochastic processes. He invented the concept of stochastic integral and stochastic differential equation, and is known as the founder of so-called Itô calculus.