Second Battle of Kōnodai
1564 CE.
Shown on the map at 35.760°, 139.895°.
In the second Battle of Kōnodai, fought in 1564, Hōjō Ujiyasu led his men to victory against Satomi Yoshihiro. Both Ujiyasu and Yoshihiro were the sons of the commanders at the first battle of Kōnodai, in which Hōjō Ujitsuna defeated the combined forces of Satomi Yoshitaka and Ashikaga Yoshiaki (Oyumi).
Text from the Wikipedia article Battle of Kōnodai (1564), licensed CC BY-SA 4.0.