| Kaihō Tsunachika | |
| Native Name: | 海北 綱親 |
| Birth Date: | 1535 |
| Death Date: | 1573 |
| Birth Place: | Ōmi Province |
| Death Place: | Odani Castle |
| Nickname: | "Zenemon" |
| Allegiance: | Azai clan |
| Children: | Kaihō Yūshō |
| Rank: | Azai-sanshō |
| Battles: | Battle of Norada (1560) Siege of Kanegasaki (1570) Battle of Anegawa (1570) Siege of Odani (1573) |
was a Japanese samurai and commander of the Sengoku period who served Azai clan as a senior retainer.[1] [2] [3] His son Kaihō Yūshō was a representative painter of the Azuchi–Momoyama period in Japan.[3] [4]
Tsunachika served as a senior retainer and military commissioner for three generations of the Azai clan. Together with Akao Kiyotsuna and Amenomori Kiyosada, Tsunachika was known as one of the .[5]
In 1573, Tsunachika is considered to have been killed in action when Oda Nobunaga attacked and toppled Odani Castle.