姉川の戦い
Tokugawa Ieyasu spent 17 years at Hamamatsu Castle, from age 29 to 45. The Battle of Anegawa, Battle of Nagashino, and Battle of Komaki and Nagakute were all fought when Hamamatsu was his seat. After his defeated at the Battle of Mikatagahara, Ieyasu forced to retreat here for what he thought would be his final stand. However, the tide later turned for Ieyasu and he survived. He renamed Hikuma Castle "Hamamatsu Castle" in 1577.