|Battle of Tonomoto|
|Part of the early Sengoku period|
|Commanders and leaders|
|Chosokabe KunichikaChosokabe Motochika||Motoyama Shigetoki|
|Casualties and losses|
In the 5th month of 1560, Chosokabe Kunichika captured Nagahama castle from the Motoyama clan. In response to this, Motoyama Shigetoki departed Asakura castle with 2,500 men to take the castle back. Kunichika intercepted him with 1,000 troops near Nagahama castle. This battle is noted for being Chosokabe Motochika first battle, in which he fought bravely, greatly impressing his father and his retainers. Shigetoki was completely routed and fled to Urado castle, where Kunichika held him in siege until he was forced to withdraw due to illness.
- Jinbutsu Tanbô・Nihon no Rekishi V.5, Sengoku no Bushô (人物探訪・日本の歴史（５）戦国の武将) Tokyo, Japan, 1982.
- Yamamoto, Takeshi. Chôsokabe Motochika (長宗我部元親) Japan, 1960.