Claim: Hosokawa Yoriyuki used to be a samurai of the Hosokawa clan before he became a deputy and chief minister.
Evidence: Hosokawa Yoriyuki (細川 頼之, 1329 – March 25, 1392) was a samurai of the Hosokawa clan, and prominent government minister under the Ashikaga shogunate, serving as Kyoto Kanrei (Shōgun's Deputy in Kyoto) from 1367 to 1379. Yoriyuki was appointed Shōgun's Deputy in 1367, when Yoshiakira was very ill; on his deathbed, Yoshiakira entrusted Yoriyuki with the care of his son Yoshimitsu. For the next six years, Yoriyuki served as his chief minister. The son of Hosokawa Yoriharu, Yoriyuki served the shogunate as a military commander, and fought the Yamana clan, and ultimately achieved victory over them in 1361.