Consequently, he was attacked by the imperial forces on May 15 of the same year (1221), while he was at his residence, and he was forced to kill himself, together with his son Mitsutsuna IGA.
このため、同年5月15日に官軍によって屋敷を襲撃され、子の伊賀光綱と共に自害を余儀なくされた。