The Battle of Sezawa was one of many battles fought by Takeda Shingen in his bid to take control of Shinano Province during the Sengoku Period of Japan. He was opposed by the combined forces of Ogasawara Nagatoki, Suwa Yorishige, Murakami Yoshikiyo, Kiso Yoshiyasu, and Tozawa Yorichika. They gathered a force of 12,000 Shinano warriors, but Shingen defeated them all, with just 3,000 men. The Shinano Forces suffered about 3000 casualties, while Shingen's forces suffered about 500 losses.