In the Honnoji Incident that occurred in 1582, he sided with Mitsuhide AKECHI with the aim of regaining former territory and occupied Nagahide NIWA's Sawayama-jo Castle.
1582年（天正10年）の本能寺の変では旧領回復を狙って丹羽長秀の居城佐和山城を陥落させ明智光秀に加担する。