Masahiro Yasuoka (安岡正篤, Yasuoka Masahiro; February 13, 1898 – December 13, 1983) was a Japanese scholar of yangmingism who, through his philosophy, reportedly exerted considerable influence on many Japanese politicians, including postwar prime ministers of Japan. He has been considered a backroom power broker or eminence grise.
Source: “Masahiro Yasuoka”, English Wikipedia (CC BY-SA 4.0), excerpt