Nobutaka's biological mother (from the Saka clan), his younger sister, his daughter and his concubine named Kanbe no Ita Gozen were handed over to Hideyoshi as hostages upon the surrender, and were killed by him.
秀吉に降伏したとき、人質として差し出した生母・坂氏と妹、娘および側室神戸の板御前は、秀吉によって殺されている。