Excelling at writing and waka (a traditional Japanese poem of thirty-one syllables), Jakusho held various posts including Zusho no kami (chief of Zushoryo [the Bureau of Drawings and Books]) and Kokushi (provincial governor) of Mikawa Province, and eventually became Jugoi (Junior Fifth Rank).
文章・和歌に秀で図書頭・三河国国司を歴任、従五位に至る。