- Chôsokabe Kunichika & Chôsokabe Motochika vs. Motoyama Shigetatsu
- Date: 1560
- Location: Tosa province
In the 5th month of 1560, Chôsokabe Kunichika captured Nagahama castle from the Motoyama clan. In response to this, Motoyama Shigetatsu departed Asakura castle with 2,500 men to take the castle back. Kunichika intercepted him with 1,000 troops. This battle is noted for being Chôsokabe Motochika's first battle, in which he fought bravely, greatly impressing his father and his retainers. Shigetatsu fled to Hirado castle, where Kunichika held him in siege until he was forced to withdraw due to illness.