Ohsaki Castle

From Jcastle.info

Ohsakijou (3).JPG


Ôsakijō is said to have been the castle of Shimizu Moriyoshi, a vassal of the Nishina Clan.

Visit Notes

Ôsakijō sits on a mountain ridge just above a small hydroelectric powerplant. There is a nice switch-back path leading to the top of the ridge for accessing the plant’s reservoir but it is closed to the public. Castle explorers have no option but to assault the mountain head-on, or take a forestry road which runs to the castle from some place in the southwest. I climbed up the slope of the mountain to where the ridge terminates first to reach Ôsakidejō, the site of a satellite fortification of Ôsakijō, and then kept on climbing from there. There is no trail and the ridge has many large boulders.

Ôsakijō features hori (trenches), dorui (earthen ramparts), and kuruwa (baileys). There are at least three bailey groupings along the ridge, and the main bailey complex is situated forward. There are several earthworks around this main bailey area, including on the western slope where there is a very snug and cosy sub-bailey (it’s small, the size of a room) ensconced by dorui. There is a trench below here on the ridge spur. There are at least two trenches along the central ridge. After the final small bailey around the ridge, passing dorui and horikiri (trenches), I came to a flattened area which was clearly part of a forestry road. It’s possible the castle continued here but the ruins have been buried, but I don’t know.

  • Pocket bailey with dorui

Castle Profile
English Name Ohsaki Castle
Japanese Name 大崎城
Founder Shimizu Moriyoshi
Year Founded Sengoku Period
Castle Type Mountaintop
Castle Condition Ruins only
Historical Period Pre Edo Period
Artifacts Horikiri, Dorui, Kuruwa, &c
Features trenches
Visitor Information
Access Climb from Dejō directly or take the old forestry road from the southwest
Visitor Information Mountain
Time Required 40 minutes
Location Ômachi, Nagano Prefecture
Coordinates 36° 28' 45.77" N, 137° 49' 40.98" E
Loading map...
Added to Jcastle 2022
Contributor ART
Admin Year Visited Viewer Contributed
Friends of JCastle
Jōkaku Hōrōki
Shiro to Kosenjō

(one vote)
Add your comment
Jcastle.info welcomes all comments. If you do not want to be anonymous, register or log in. It is free.