The Battle of Okehazama took place on 12 June 1560 in Owari Province, in today's Aichi Prefecture. In this battle, the heavily outnumbered Oda clan troops, commanded by Oda Nobunaga, defeated Imagawa Yoshimoto and established Oda as one of the front-running warlords in the Sengoku period.

Imagawa Yoshimoto was a Japanese daimyō of the Sengoku period. Based in Suruga Province, he was known as The number one Daimyō in the Tōkaidō ; he was one of the three daimyō that dominated the Tōkaidō region. He died in 1560 while marching to Kyoto to become Shogun. He was killed in the village of Dengakuhazama in Okehazama by Oda Nobunaga.