1540: Siege of Yoshida-Koriyama - Sengoku Shogun Map
Amago Haruhisa attacked Yoshida-Koriyama Castle in Aki, but Mōri Motonari successfully defended it with Ōuchi reinforcements. The conflict between the Amago and Mōri in Chūgoku became clear.
Major events
- 1540-09: Siege of Yoshida-Koriyama — Amago Haruhisa attacked Yoshida-Koriyama Castle, but Mōri Motonari defended it with Ōuchi reinforcements.