The Iyo-Utsunomiya family record states that 'Sadayasu, who was called Rokuro and initially named Kageyasu, assumed the positions of the Governor of Mino Province and Governor of Totomi Province. He lived at Utsunomiya, Yasu and later moved to Kyoto. His Buddhist name was Renchi.'
伊予宇都宮系図には貞泰については「六郎、始景泰、美濃守、遠江守、野州宇都宮の住人、後京都に住す、法名蓮智」とある。