Battle of Nakatomigawa
1582 CE.
Shown on the map at 34.134°, 134.517°.
The Battle of Nakatomigawa (中富川の戦い) was fought on August 27 to August 28 of 1582 on Shikoku island between the Chōsokabe clan and the Miyoshi clan.
Text from the Wikipedia article Battle of Nakatomigawa, licensed CC BY-SA 4.0.