Nyunomi Castle

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Nyuunomijou (1).JPG


Although the castellan of Nyūnomijō is not known to history, the territory was certainly under the suzerainty of the Nishina Clan, Nyūnomijō being a satellite fortification of Kibunejō. See my profile on Azumi Kibune Castle for more information.

Visit Notes

Nyūnomijō was really interesting. I couldn’t find a map to guide me at the time so I was going in blind, but I found an earthworks castle ruin with many impressive features. Nyūnomijō is guarded to the mountainside rear by four horikiri (trenches that cut the ridge) in a row, with dorui (earthen ramparts) in between. Along the eastern side beneath the main bailey is a most wonderful Sengoku period mountaintop castle feature known as unejōtatebori, which is a series of tatebori (climbing trenches) arranged in a row one after the other. The shukuruwa (main bailey) is surrounded by dorui. Below the shukuruwa is the second bailey, and between the second bailey and the third bailey is a double trench system. The third bailey complex has many koshikuruwa (sub-baileys) spilling down the mountainside before it in a series of protective “U” shapes. This no-name site proved to be a solid yamajiro and I was quite happy with it. I hiked to the ruins of Nyūnomijō from Aokijō by carefully following a series of ridges. Even though there weren’t trails as such I met with no serious impediments.

  • Uenejoutatebori / rows of climbing trenches

Castle Profile
English Name Nyuunomi Castle
Japanese Name 丹生子城
Founder Nishina Clan (probably)
Year Founded Sengou Period
Castle Type Mountaintop
Castle Condition Ruins only
Historical Period Pre Edo Period
Artifacts Horikiri, Dorui, Tatebori, Kuruwa, Koshikuruwa
Features trenches
Visitor Information
Access Shinano-Ômachi Station or Minami-Ômachi Station on the Ôito Line; 40 minute walk to trailhead
Visitor Information 24/7 free; mountain
Time Required 40 minutes
Location Ômachi, Nagano Prefecture
Coordinates 36° 28' 35.90" N, 137° 52' 20.42" E
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Added to Jcastle 2021
Contributor ART
Admin Year Visited Viewer Contributed
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