When Kai and Shinano became vacant because of the Honnoji Incident (the Raid on the Honno-ji Temple (in 1582, in which Nobunaga ODA was killed)), the Tenshojingo War by the Tokugawa clan and Gohojo clan occurred with respect to the former territory of the Takeda clan and the Tokugawa clan, that won the War, obtained Kai and Shinano.
本能寺の変により空域化すると武田遺領を巡り徳川氏や後北条氏による天正壬午の乱が起こり、甲斐・信濃は乱を制した徳川氏が領した。