After the fall of the Taira clan, Nobutsura was placed in Kebiishi Office of Aki Province by MINAMOTO no Yoritomo, and he was granted Oyaso, Suzu County, Noto Province.
平家滅亡後、源頼朝より安芸国検非違使所に補され、能登国珠洲郡大家荘を与えられた。