Kizō Yasui

was a Japanese corporate executive. He held the positions of the chairman of the board of directors of Toray Industries, vice-president of Mitsui Bank, president of Mitsui Petrochemicals Industries, vice-chairman of Nihon Keidanren (Japan Business Federation), chairman of Japan Chemical Fibers Association and others. His older sister, Kinu, married into a distinguished family in Akasaka-juku (Nakasendō), the Yabashis that Emperor Shōwa officially visited in 1946. Otohiko Hara (jp), formerly Otohiko Yabashi, is his nephew. Shinya Yabashi and Hideroku Hara (jp) are his grandnephews. Yasui graduated from Shiga First Junior High School (now, Shiga Prefectural Hikone Higashi High School) and from Tokyo College of Commerce (now, Hitotsubashi University) in 1926 under the old system of education. While in the College, he joined the seminar of Prof. Kin-no-suke Otsuka.

He entered Mitsui Bank after graduation. He became managing director, senior managing director and vice-president of Mitsui Bank in 1959, president of Mitsui Petrochemicals Industries (now, Mitsui Chemicals) in 1961, （jp）, former Vice Minister of Ministry of Finance and former president of Japanese National Railways.

Kinship father – Kizo Yasui (entrepreneur from Hikone, Shiga in Meiji Era. He was nicknamed Kōshō Chōchō（Commercial College Town Mayor） because he was elected Town Mayor of Hikone Town against his will while he was in Tokyo to negotiate the establishment of Hikone Commercial College（now, the Faculty of Economics, Shiga University）and resigned his post of the Town Mayor of Hikone when he saw new-facility construction of Hikone Commercial College. nephew – Otohiko Hara (jp) (Formerly Otohiko Yabashi. Former Chief executive officer of Unitika Trading. One of the first Japanese businesspersons who lead Nichibo (Unitika) to the first overseas expansion of Japanese corporations after World War II) grandnephew – Shinya Yabashi (President of Yabashi Industries, Chairman of Ogaki Municipal Board of Education) grandnephew – Hideroku Hara (jp) (Legal Scholar, Professor at Shiga University)