| Nagurumi Castle | |
| Nativename-A: | Japanese: 名胡桃城 |
| Location: | Tone, Gunma Prefecture, Japan |
| Type: | Hirayama-style castle |
| Ownership: | Numata clan, Sanada clan |
| Condition: | ruins |
| Built: | 1492 |
| Builder: | Numata clan |
| Demolished: | 1590 |
| Past Commanders: | Suzuki Shigenori |
| Events: | Siege of Nagurumi Castle |
is a castle structure in Tone, Gunma Prefecture, Japan.[1] The castle played historically important role because invasion of the castle by the Later Hōjō clan caused Siege of Odawara (1590).[2]
The castle is now only ruins, just some moats and earthworks.[3] The castle was listed as one of the Continued Top 100 Japanese Castles in 2017.[4]