The siege of Uehara was the first of many steps taken by

Takeda Shingen was daimyō, daimyo of Kai Province during the Sengoku period of Japan. Known as "the Tiger of Kai", he was one of the most powerful daimyo of the late Sengoku period, and credited with exceptional military prestige. Shingen was based in a p ...

in his bid to seize control of

Shinano Province or is an old province of Japan that is now Nagano Prefecture. Shinano bordered Echigo, Etchū, Hida, Kai, Kōzuke, Mikawa, Mino, Musashi, Suruga, and Tōtōmi Provinces. The ancient capital was located near modern-day Matsumoto, whi ...

. Uehara Castle had been controlled by

Suwa Yorishige Suwa Yorishige may refer to: * Suwa Yorishige (daimyo), Japanese samurai daimyo of the Shinano province * Suwa Yorishige (Nanboku-chō period), military commander during the Nanboku-chō period {{hndis ...

before it was taken by Shingen.

References

*Turnbull, Stephen (1998). 'The Samurai Sourcebook'. London: Cassell & Co. 1542 in Japan Sieges of the Sengoku period Attacks on castles in Japan Conflicts in 1542 Shinano Province Military history of Nagano Prefecture 16th-century military history of Japan {{Japan-battle-stub