The battle of Sezawa was one of many battles fought by Takeda Shingen

Takeda Shingen

, of Kai Province, was a preeminent daimyo in feudal Japan with exceptional military prestige in the late stage of the Sengoku period.-Name:Shingen was called "Tarō" or "Katsuchiyo" during his childhood...

 in his bid to take control of Shinano Province

Shinano Province

or is an old province of Japan that is now present day Nagano Prefecture.Shinano bordered on Echigo, Etchū, Hida, Kai, Kōzuke, Mikawa, Mino, Musashi, Suruga, and Tōtōmi Provinces...

. Here he was opposed by the combined forces of Ogasawara Nagatoki

Ogasawara Nagatoki

' was a daimyo of Shinano Province during the Sengoku Period in Japan. In 1542, Shinano Province was invaded by Takeda Shingen, and Ogasawara allied with Murakami Yoshikiyo, Suwa Yorishige, and Kiso Yoshiyasu in an attempt to stop him...

, Suwa Yorishige

Suwa Yorishige

For the samurai by the same name who died in 1335, see Suwa Yorishige .' was a Japanese samurai....

, Murakami Yoshikiyo

Murakami Yoshikiyo

Murakami Yoshikiyo a retainer of the Japanese clan of Uesugi during the Sengoku Period of the 16th century. Yoshikiyo followed in fighting against both Takeda Nobutora and his son Takeda Shingen. Yoshikiyo was also a very close ally under Uesugi Kenshin.He fought at the Battles of Kawanakajima in...

, Kiso Yoshiyasu, and Tozawa Yorichika. They gathered a force of 12000 Shinano warriors, but Shingen defeated them all, with just 3000 men. The Shinano Forces suffered about 3000 casualties, while Shingen's forces suffered about 500 losses.