Osaka Castle (Suwa)

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It is said that Suwa-Osaka Castle was first built in 1154 by Minamoto Nobuyoshi of the Kai-Genji. It was controlled by the Osaka Clan who were followers of the Suwa Clan. It appears from what remains that Osakajō was a simple fort primarily used as a base for a signal tower. In 1542 Osakajō was captured by the Takeda Clan and in 1582 it was abandoned following their destruction.

Visit Notes

There's not much to see at the site of Osaka Castle but I stopped by on one of my "castle walks" en route to Aruga Castle. Osakajō's most obvious ruin is a trench at the foot of the castle mount. It was the first site of the day for me and so, having plenty of energy yet, I persevered, searching further up the mountain than was necessary. I thought I identified some terracing and sub-baileys in parts but it seems like much of the ruin has been demolished in the construction of a motorway which passes below.


Castle Profile
English Name Osaka Castle (Suwa)
Japanese Name 諏訪小坂城
Founder Minamoto Nobuyoshi (legendary) or Osaka Clan
Year Founded 1154 (legendary) or Sengoku Period
Castle Type Mountaintop
Castle Condition Ruins only
Historical Period Pre Edo Period
Artifacts Hori
Features trenches
Visitor Information
Access Okaya Station on the Chuo Main Line; 45 minute walk
Visitor Information 24/7 free; mountain
Time Required 30 minutes
Location Okaya, Nagano Prefecture
Coordinates 36° 2' 1.57" N, 138° 3' 53.89" E
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Added to Jcastle 2020
Contributor ART
Admin Year Visited Viewer Contributed

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