Yoshihiro served TSUTSUI clan as one of the Kokujin ryoshu (local samurai lord) in Yamato Province, but he had a hard time during Eiroku era (1558 - 1570) when Ido-jo Castle in which he had lived was captured by Hisahide MATSUNAGA.
大和国の国人領主の一人として筒井氏に仕えていたが、永禄年間には松永久秀のため居城井戸城を攻め落とされるなど苦戦した。