Nagasaki 42 map courtesy of Google Earth
| Length |
| 11.3 km |
| Route name |
| Hirado Ikitsuki line |
| Southern terminus |
| Hirado-shi, Kasuga-cho, route 19 |
| Northern terminus |
| Hirado-shi, Ikitsuki-cho, dead end |
| Municipalities traversed (S to N) |
 Hirado-shi |
| Points of interest |
 Shiodawara Dangai (cliff) Ōbaehana Toudai (lighthouse) |
| Road intersections |
| route 19 |
| Ferry intersections |
| Hakata-Ikitsuki-Ukuhira line, Ikitsukishima port |
| Notes |
| Nagasaki 42 begins as the Ikitsuki-ohashi (toll bridge), which costs ¥200. It is the only numbered road on the island. |