While Nobunaga ODA aggressively purged the former vassals of the Takeda clan after the fall of the Takeda clan, he sheltered his former colleagues, which facilitated the capture of Koshu after the Honnoji Incident.
武田氏滅亡後は織田信長による旧武田家臣の粛清の嵐の中、かつての同僚を匿い、本能寺の変以後の甲州の取り込みを円滑にした。