| Country: | JPN |
| Type: | National |
| Route: | 128 |
| Map Custom: | yes |
| Length Km: | 131.6 |
| Length Ref: | [1] |
| Established: | 1953 |
| Direction A: | South |
| Terminus A: | / Prefectural Road 302 in Tateyama, Chiba |
| Direction B: | North |
| Terminus B: | in Chūō-ku, Chiba |
| Previous Type: | Route |
| Previous Route: | 127 |
| Next Type: | Route |
| Next Route: | 129 |
National Route 128 is a national highway of Japan connecting Tateyama, Chiba and Chūō-ku, Chiba in Japan, with a total length of 131.6 km (81.77 mi). Its northernmost point is at geographic co-ordinates:35.550978,140.349827 and its southernmost at:34.993371,139.869347.