Hakii Castle

Hakiijō is a yamajiro (mountaintop castle) ruin in Hakii village in Minobu Township of historical Koma County. Ruins remain in the form of dorui (earthen ramparts), including a gate site, and a bailey. However, despite a large stele proclaiming the site and a profile for it on the town's website, mu

History

Hakiijō is said to have been built by Hakii Sanenaga in the early Kamakura period, but this is likely a conflation with the yakata (fortified manor hall) some distance south where Sanenaga is known to have lived. The Hakii traced their lineage to the Nanbu Clan, originally of the Seiwa-Genji of Kai, who relocated to Mutsu in the Muromachi period. In 1521, Fukushima Masanari, a vassal of the Imagawa Clan, invaded Kai Province from Suruga Province, and clashed with forces under Takeda Nobutora. The Takeda were victorious, and following the failed invasion, Hakii Yoshizane, who had supported the invasion, was attacked by Takeda forces at a place called 'Hakii no mine no shiro ("Castle of the peak of Hakii")', and it is thought that this refers to Hakiijō.

Field Notes

Hakiijō is a yamajiro (mountaintop castle) ruin in Hakii village in Minobu Township of historical Koma County. Ruins remain in the form of dorui (earthen ramparts), including a gate site, and a bailey. However, despite a large stele proclaiming the site and a profile for it on the town's website, much of the ruins are on private property, and guarded by dogs no less, so I could not see all of the remains.

Gallery

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  Castle stele
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Castle Profile
English Name	Hakii Castle
Japanese Name	波木井城
Founder	Hakii Yoshizane
Year Founded	Before 1521
Castle Type	Mountaintop
Castle Condition	Ruins only
Designations	Local Historic Site
Historical Period	Pre Edo Period
Artifacts	Dorui
Features
Visitor Information
Access	Nearest station is Shinosawa Station on the Minobu Line
Hours	Access Limited
Time Required	10 minutes
URL	Castle Website
Location	Minobu, Yamanashi Prefecture
Coordinates	35.38714, 138.44231
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Admin
Added to Jcastle	2025
Contributor	ART
Admin Year Visited	Viewer Contributed
Friends of JCastle
Jōkaku Hōrōki
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