Battle of Azukizaka (1542)

In the first battle of Azukizaka (小豆坂の戦い, Azukizaka no tatakai) Oda Nobuhide defeated Imagawa Yoshimoto, setting the stage for his son, Oda Nobunaga, to become one of Japan's greatest warlords. Despite the defeat, later in 1548, Imagawa defeated Nobuhide in the Second Battle of Azukizaka and continued to expand his territory until 1560, when he faced Nobunaga and was killed in the Battle of Okehazama.