In the next year, 1190, he joined a campaign to crash the Rebellion of OKAWA Kaneto which happened in Oshu; after this incident Yuki was deemed as Yoritomo's close adviser equivalent to Kagetoki KAJIWARA.
翌建久元年（1190年）、奥州で起きた大河兼任の乱の鎮定に参加し、以後梶原景時と並ぶ頼朝の側近と目されるようになった。