Matsumoto Castle
Following this defeat, and the conquest of his lands, Ogasawara allied himself with Uesugi Kenshin, Takeda's primary rival. He fought alongside Takatō Yoritsugu in 1545, ultimately failing in their defense against the first siege of Takatō Castle. Ogasawara was defeated by Shingen again several years later, in the 1548 Battle of Shiojiritoge, in which he was hit by a surprise attack at dawn; many of his men were killed as they reached for weapons and armor. His losing streak continued the following year, when Shingen seized a number of fortresses, including Fukashi (now Matsumoto Castle), in the Siege of Fukashi.