Usual hours and prices, checked 2026-10-06 against the sources under “What this place is”. They can change for holidays and events — confirm before you go. Official site
Our guide
Nagurumi Castle in Tone, Gunma, played an important part in history: its capture by the Later Hōjō clan led to the Siege of Odawara in 1590. Only ruins remain now — some moats and earthworks — and in 2017 it was listed among the Continued Top 100 Japanese Castles.
Gokan Station on the Jōetsu Line is about 1.3 km away in a straight line. Numata Castle is about 4.8 km off.
Written by japan-spots.com (2026-09-22) from the sources credited on this page. Distances are straight lines between map positions.
Photos
Photos from Wikimedia Commons, each under its own licence — see credits
- Nagurumijyo — デジタルカメラ · Public domain · source · resized
- Nagurumi Castle parking — photo: Qurren ( talk ) Taken with Canon PowerShot G9 X · CC BY-SA 3.0 · source · resized
- Nagurumi Castle museum — photo: Qurren ( talk ) Taken with Canon PowerShot G9 X · CC BY-SA 3.0 · source · resized
- Nagurumi Castle 2017-09 1 — photo: Qurren ( talk ) Taken with Canon PowerShot G9 X · CC BY-SA 3.0 · source · resized
- Nagurumi Castle 2017-09 2 — photo: Qurren ( talk ) Taken with Canon PowerShot G9 X · CC BY-SA 3.0 · source · resized
- Mount Mitsumine (Gunma) — photo: Qurren ( talk ) Taken with Canon PowerShot G9 X · CC BY-SA 3.0 · source · resized
What this place is
Nagurumi Castle (名胡桃城, Nagurumi-jō) is a castle structure in Tone, Gunma Prefecture, Japan. The castle played historically important role because invasion of the castle by the Later Hōjō clan caused Siege of Odawara (1590). The castle is now only ruins, just some moats and earthworks. The castle was listed as one of the Continued Top 100 Japanese Castles in 2017.
Visitor information checked: 2026-10-06 · Official visitor information
Background text from Wikipedia (CC BY-SA 4.0)
What to expect at this type of place: Castle
Nearby station
Nearby station: Gokan (Jōetsu Line), about 1.3 km from the spot in a straight line.
Worked out on 2026-09-14 from this place’s map position, using HeartRails Express station data and station names from Wikidata. The distance is a straight line, not a walking route, and says nothing about buses, transfers or timetables — plan the trip on Google Maps.
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