Furumiya Castle (Kai)

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KaiFurumiyajou (5).JPG


Furumiyajō was built in the Muromachi period by the Tsugane Clan as their fortified residence. It is said that the Tusgane Clan was formed by settlers from the Satake Clan of Saku County in Shinano. Indeed, Furumiyajō is situated along an important route between Kai Province and Saku. In the Sengoku period the Tsugane served the Takeda Clan of Kai, forming the Tsuganeshū, a group of warriors dedicated to protecting the Kai-Shinano border. After the fall of the Takeda and Oda hegemons, the Tsugane joined the Tenshō Jingo rebellion and then fought on the side of Tokugawa Ieyasu as he tried and succeeded in wresting Kai from Hōjō Ujinao.

Visit Notes

Furumiyajō is a fortification site in the Tsugane area of Sudama Township in Hokuto Municipality, Yamanashi Prefecture. The most prominent feature of the ruins of this earthworks fort site is the long segment of karabori (dry moat) to the northwest of Tsugane’s Suwa Shrine. It appears that this was a double moat structure, though now a lane runs through the outer moat segment, obscuring it. The inner moat and dorui (earthen ramparts) are fairly well preserved, though a bit overgrown. The site of Furumiyajō is now that of a preserved school. The old school houses are open to the public, and there is a souvenir shop-bakery-restaurant which serves school meals! I bought a packet of ‘school lunch curry’ and dried persimmons.

  • Castle Marker; shrine in main bailey

Castle Profile
English Name Furumiya Castle (Kai)
Japanese Name 甲斐古宮城
Founder Tsugane Clan
Year Founded Muromachi Period
Castle Type Fortified Manor
Castle Condition Ruins only
Historical Period Pre Edo Period
Artifacts Karabori, Dorui
Features trenches
Visitor Information
Access Sudama IC (E20), drive 20 mins
Visitor Information 24/7 free; park
Time Required 40 minutes
Location Hokuto, Yamanashi Prefecture
Coordinates 35° 51' 5.87" N, 138° 26' 41.42" E
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Added to Jcastle 2023
Contributor ART
Admin Year Visited Viewer Contributed
Friends of JCastle
Oshiro Tabi Nikki
Jōkaku Hōrōki

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