Yokoyama Castle (Ina)

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InaYokohamajou (2).JPG


Although it is not known when Yokoyamajō was built or by whom, it seems quite likely that it was part of the network of fortifications protecting the uppermost part of the Ina Valley, which was Suwa Clan territory. In that case it was a satellite fortification of Ryūgasakijō. See: Ina Ryuugasaki Castle.

Visit Notes

There used to be a fortification ruin here but it was completely flattened by the development of a housing estate called Oh’ishidaira, and now nothing remains.


Castle Profile
English Name Yokoyama Castle (Ina)
Japanese Name 伊那横山城
Founder Suwa Clan
Year Founded Medieval Era
Castle Type Mountaintop
Castle Condition Ruins only
Historical Period Pre Edo Period
Visitor Information
Access Tatsuno Station on the Chūō Main Line and Iida Line; 25 minute walk
Visitor Information Access Limited
Time Required 10 minutes
Location Tatsuno, Nagano Prefecture
Coordinates 35° 58' 49.87" N, 138° 0' 31.18" E
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Added to Jcastle 2022
Contributor ART
Admin Year Visited Viewer Contributed
Friends of JCastle
Oshiro Tabi Nikki

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