| Country: | JPN |
| Type: | National |
| Route: | 122 |
| Map Custom: | yes |
| Length Km: | 158.4 |
| Length Ref: | [1] |
| Established: | 1963 |
| Direction A: | North |
| Terminus A: | in Nikkō |
| Direction B: | South |
| Terminus B: | in Toshima, Tokyo |
| Previous Type: | Route |
| Previous Route: | 121 |
| Next Type: | Route |
| Next Route: | 123 |
National Route 122 is a national highway of Japan connecting Nikkō, Tochigi and Toshima, Tokyo in Japan, with a total length of 158.3km (98.4miles).
A section of National Route 122 in Midori in Gunma Prefecture is a musical road.[2]
Route 122 was originally designated on 18 May 1953 from Maebashi to Mito. This was redesignated as Route 50 on 1 April 1963 and the current Route 122 was designated the same day.