Okō Castle
| Okō Castle | |
|---|---|
岡豊城 | |
| Nankoku, Kōchi Prefecture, Japan | |
Stone wall of Sannodan compound | |
| Site information | |
| Type | Hirayama-style castle |
| Owner | Chōsokabe clan |
| Condition | ruins |
| Location | |
| Coordinates | 33°35′41.86″N 133°37′20.97″E / 33.5949611°N 133.6224917°E |
| Site history | |
| Built | 13c-14c |
| Built by | Unknown |
| Demolished | 1591 |
| Garrison information | |
| Past commanders | Chōsokabe Kunichika, Chōsokabe Motochika |
Okō Castle (岡豊城, Okō-jō) was a Japanese castle structure located in what is now part of the city of Nankoku Kōchi Prefecture, Japan. It was the original base of power for the Chōsokabe clan who were feudal lords of Tosa Province during the late Muromachi and Sengoku periods and famous as the birthplace of the warlord Chōsokabe Motochika. Its ruins have been protected as a National Historic Site since 2008.