Battle of Dōmyōji
1615 CE.
Shown on the map at 34.568°, 135.620°.
On June 5, 1615, the Eastern Army of Tokugawa Ieyasu and the Osaka Army of Toyotomi Hideyori clashed in battle at Dōmyōji (道明寺の戦い; Dōmyōji no tatakai), Osaka. This battle was one of Japan's major historical battles between samurai forces. This battle was one of a number of battles that took place during the Summer Campaign of the Siege of Osaka that led up to the fall of Osaka to the forces of Tokugawa and the death of Toyotomi Hideyori. A vanguard force ahead of the Osaka Army was commanded by Gotō Mototsugu. He had with him a force of 2,800 samurai and his mission was to guard against the arrival of elements of The Eastern Army. The eastern border of Osaka is protected by a natural border known as the Ikoma Mountains. Gotō was given the task of guarding the area near Komatsu-yama, a hilly area located near one of very few mountain passes. This pass in the range is created by the Yamato River, which runs just north of Komatsu-yama. He had planned to occupy the high ground provided by the slopes of Komatsu-yama and prevent the enemy from freely entering the flat plains of Osaka that exist once past the mountain.
Text from the Wikipedia article Battle of Dōmyōji, licensed CC BY-SA 4.0.