Komori Castle (Omi)

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GamouKomorijou (11).JPG


Komorijō was the fortified residence of the Komori Clan who are thought to have been vassals of the Iba Clan. The Iba Clan, who were once a powerful clan, saw their power wane, and they would later occupy the area, called Kirihara-gō, as deputies of the Hakuta Domain of the Watanabe Clan, using Komorijō as a base to oversee Hakuta Domain (in Izumi Province) enclaves in Ōmi Province. The ruins of Komorijō consisted of earthworks ensconcing several baileys surrounded by karabori (dry moats) which ran 150m north-south by 50m wast-west, but all remains of the castle were destroyed by the suburban expansion of Ōmi-Hachiman between 2008 and 2013. Pictures of the ruins before they were cleared can be found on some castling blogs; it appears the area used to be somewhat forested with bamboo groves.

Visit Notes

Unfortunately there is nothing to see of Komorijō, as all ruins of the castle, which was fairly large, were destroyed by housing development relatively recently. The site today is residential with some surrounding fields. Kanda Shrine is located nearby.


Castle Profile
English Name Komori Castle (Omi)
Japanese Name 小森城
Founder Komori Clan; Iba Clan
Year Founded Muromachi Period; Sengoku Period
Castle Type Flatland
Castle Condition Ruins only
Historical Period Pre Edo Period
Artifacts Karabori (destroyed)
Visitor Information
Access Ōmi-Hachiman Station on the Biwako Line; 25 minute walk
Visitor Information 24/7 free; fields
Time Required 20 minutes
Location Ōmi-Hachiman, Shiga Prefecture
Coordinates 35° 6' 42.12" N, 136° 4' 58.55" E
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Added to Jcastle 2022
Contributor ART
Admin Year Visited Viewer Contributed
Friends of JCastle
Jōkaku Tanbō
Masaki Shibata

(2 votes)
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15 months ago
Score 1++
Pictures show some ditches around the shrine but that's it. Very sad what happened to the ruins of this castle.