| Country: | JPN |
| Type: | National |
| Route: | 291 |
| Map Custom: | yes |
| Length Km: | 161.6 |
| Length Ref: | [1] |
| Previous Type: | Route |
| Previous Route: | 290 |
| Next Type: | Route |
| Next Route: | 292 |
National Route 291 is a national highway of Japan connecting Maebashi, Gunma and Kashiwazaki, Niigata in Japan, with a total length of 161.6 km (100.41 mi).
The route consists of the Nakayama Tunnel, a vehicular tunnel, replacing the former Nakayama Tunnel.
A section of National Route 291 in the town of Minakami in Gunma Prefecture is a musical road.[2]
A section of the road leading to Ichinokurasawa cliff in Minakami is closed for vehicles during the Summer. A separate section of the road alongside the Nobori River in Minamiuonuma is closed during the Winter.