In the Sengoku period (period of warring states) when the imperial court and court nobles started selling their official court ranks due to financial difficulties, Ukyo no daibu, pronoun of Shogunal Deputy the Hosokawa clan which was the samurai family of pedigree, was believed to be the nifitiest official court rank for Sengoku daimyo (Japanese territorial lord in the Sengoku period) in provinces (especially for daimyo in the Tohoku region) who wanted to add dignity.
戦国時代になり、朝廷や公家が経済的に困窮し、官位が売られるようになると、武家の名門である、管領細川家の代名詞とも言える右京大夫は、地方の戦国大名（特に東北地方の大名）にとって箔付けのために最も人気のある官位であったという。