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413:. On hearing of the fall of Nagahama Castle, the Motoyama responded by sending 1000 troops in a counterattack. Although the Chōsokabe had only 300 men, the fierce resistance led by Chōsokabe Motochika foiled the Motoyama attempt to retake the castle. Chōsokabe Kunichika died shortly after the battle. Motochika defeated an attempt by the Aki clan to take Okō Castle in 1563 and by 1570 had secured control over all of the Kochi Plain. By 1575 he had expelled the Ichijō clan and had united Tosa Province under his rule. Chōsokabe Motochika then invaded Awa and Iyo provinces, which he conquered by around 1580. Motochika was allied with
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viewed the Chōsokabe as an increasing threat and launched an invasion of
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who had estates in western Tosa. The Chōsokabe attempted to capitalize on his unrest, but this resulted in an attack on Okō Castle by the neighboring
Motoyama clan in 1508, and Chōsokabe Kanetsugu was forced to commit suicide.
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Okō Castle was located on a 97-meter mountain at the northern edge of the Kochi plain, next to the Kokubu River. It is located near the historic center of Tosa
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was built in what was once the Third
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passes this castle, making it a strategic location for controlling the movement of people and goods in southern
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and entered Tosa
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The castle is now only ruins, with low some stone walls, moats, and earthworks. The
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The exact date of the castle's foundation is unknown but built in the
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narrowly escaped from Okō Castle and several years later returned by
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are in the vicinity. The main road from this area to
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structure located in what is now part of the city of
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359:are uncertain. The clan claimed descent from the
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686:(in Japanese). Agency for Cultural Affairs
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582:List of historic sites of Japan (Kōchi)
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486:Tsumenodan compound (Honmaru compound)
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381:of Tosa Province (along with Awa and
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730:(in Japanese). Nankoku city official
441:The castle was listed as one of the
836:Continued 100 Fine Castles of Japan
587:Kōchi Prefectural Museum of History
570:Kōchi Prefectural Museum of History
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534:Gate under the Tsumenodan compound
443:Continued Top 100 Japanese Castles
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58:Stone wall of Sannodan compound
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1516:Castles in Kōchi Prefecture
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616:(in Japanese). 高知県立歴史民俗資料館
151:33.5949611°N 133.6224917°E
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755:(in Japanese). 戦国ヒストリー
638:(in Japanese). 南国市観光協会
558:Stone wall of Sannodan
317:National Historic Site
777:(in Japanese). 日本城郭協会
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1220:Hachimanyama Castle
660:(in Japanese). じゃらん
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1254:Kuroi Castle
1197:Akagi Castle
1142:Ōgaki Castle
1132:Naegi Castle
1094:Fukui Castle
905:Akita Castle
853:Shinori Date
779:. Retrieved
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732:. Retrieved
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690:15 September
688:. Retrieved
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415:Oda Nobunaga
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200:Site history
1422:Hara Castle
1099:Ōno Castle
1023:Kōshin'etsu
973:Oshi Castle
391:Ichijō clan
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130:Coordinates
1510:Categories
1402:Kii Castle
1369:Okō Castle
1182:Tsu Castle
775:"続日本100名城"
593:References
263:Okō Castle
236:commanders
221:Demolished
114:Okō Castle
84:Okō Castle
19:Okō Castle
838:by region
753:"長宗我部 国親"
728:"国史跡 岡豊城"
614:"国史跡 岡豊城"
445:in 2017.
361:Hata clan
305:Muromachi
192:Condition
1071:Hokuriku
845:Hokkaidō
576:See also
546:Dry moat
401:His son
387:Ōnin War
323:Location
1482:Okinawa
1336:Shikoku
1284:Chūgoku
781:25 July
759:25 July
734:25 July
712:25 July
664:25 July
642:25 July
620:25 July
449:Gallery
430:Current
375:became
347:History
341:Shikoku
286:Nankoku
216:Unknown
208:13c-14c
37:Nankoku
1379:Kyūshū
1207:Kansai
1003:Odaiba
877:Tōhoku
680:"岡豊城跡"
658:"岡豊城跡"
371:, the
280:was a
275:Okō-jō
1119:Tōkai
935:Kantō
706:"岡豊城"
636:"岡豊城"
378:shugo
293:Japan
205:Built
195:ruins
182:Owner
45:Japan
783:2019
761:2019
736:2019
714:2019
692:2021
666:2019
644:2019
622:2019
307:and
234:Past
224:1591
167:Type
269:岡豊城
27:岡豊城
1512::
1324:/
1247:/
744:^
682:.
601:^
343:.
291:,
272:,
242:,
43:,
39:,
828:e
821:t
814:v
785:.
763:.
738:.
716:.
694:.
668:.
646:.
624:.
278:)
266:(
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