Whereas the Utsunomiya clan on the Northern Court side moved to Chikuzen Province, Sadahisa UTSUNOMIYA on the Southern Court side, the second son of Sadayasu UTSUNOMIYA moved to Yatsushiro, Higo Province and is believed to be the founder of the Chikugo-Utsunomiya clan.
が、北朝(日本)方の豊前宇都宮氏に対して、南朝(日本)方で肥後国八代に移った宇都宮貞泰の次男の宇都宮貞久が始まりとされる。