Osakatono Yashiki (Suwa)




The Suwa-Osaka Clan was founded when Suwa Suketada, the son of Suwa Atsutada, was enfoeffed with territory in the Osaka township, becoming Osaka Suketada, in the early Kamakura period. The Osaka Clan supported the Suwa Clan in their strife against the Kanasashi Clan in the Nanbokuchō period. The Suwa Clan would eventually be victorious in 1518. Takeda Shingen would conquer the area in the Sengoku period, and, with the backing of Ogasawara Nagatoki, the Osaka Clan and other local clans rebelled against him. However, their rebellion was crushed, and the clan was defeated in 1548. Some Osaka clansmen continued on as priests at Suwa-taisha up until the end of the Edo period. It's not known whether Suwa-Osakajō was abandoned in 1548 or 1582, but it seems that the residential portion of the jōkan (castle-residence complex) lasted only until the defeat of the clan in 1548. The hilltop portion of the fort may have been repurposed and used until 1582 by Takeda forces.

Visit Notes

Osakatono-yashiki was the kyokan (residential annex) of Suwa-Osakajō. The site is now fields at the southern foot of a wooded hill on which the fort was located.

See also Suwa Osaka Castle.

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Castle Profile
English Name Osakatono Yashiki (Suwa)
Japanese Name 諏訪小坂殿屋敷
Founder Osaka Clan
Year Founded Early Kamakura Period
Castle Type Fortified Manor
Castle Condition Ruins only
Historical Period Pre Edo Period
Visitor Information
Access Okaya Station on the Chūō East Line; walk 45 minutes
Visitor Information 24/7 free; fields
Time Required 10 minutes
Location Okaya, Nagano Prefecture
Coordinates 36° 2' 7.73" N, 138° 3' 47.05" E
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Added to Jcastle 2023
Contributor ART
Admin Year Visited Viewer Contributed
Friends of JCastle
Shiro Meguri

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