In 1738, at the age of 14, he had an audience with Yoshimune TOKUGAWA (the eighth Shogun), was assigned as Iyo no Kami (Governor of Iyo Province) and promoted to Jugoinoge (Junior Fifth Rank, Lower Grade).
元文3年（1738年）に14歳で徳川吉宗に拝謁し、伊予守に任じられ従五位下に叙される。