Battle of Azukizaka
1542 CE.
Shown on the map at 34.930°, 137.178°.
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, Yoshimoto 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. In response to Oda moves into Western Mikawa, Imagawa Yoshimoto moved forces into Ikutahara in the 8th month of 1542. Oda Nobuhide responded to this by leaving his position at Anjô castle and crossing the Yahagi river taking up a position at Kamiwada, and in the 10th month, engaged in battle at Azukizaka, southeast of Okazaki castle. The Imagawa vanguard was led by a warrior by the name of Yuhara of Suruga. Nobuhide was joined by his brothers Nobuyasu, Nobumitsu, and Nobuzane. The battle was quickly won by the Oda side, with credit given to seven Samurai, known as the "Seven Spears of Azukizaka". Kawajiri Hidetaka fought with Yuhara (由原), who was the forerunner of the Imagawa clan, and defeated him at the battle's end.
Text from the Wikipedia article Battle of Azukizaka (1542), licensed CC BY-SA 4.0.