Chiba 42 map courtesy of Google Earth
| Length |
| 1,826 m |
| Route name |
| Matsubushi Showa Sekiyado line |
| Western terminus |
| Noda-shi Sekiyado, Chiba/Saitama border (with route 26) |
| Eastern terminus |
| Noda-shi Sekiyado, route 17 (with route 26) |
| Municipalities traversed (W to E) |
 Noda-shi |
| Points of interest |
 Sekiyado-jo Museum |
| Road intersections |
| Saitama Prefectural Route 26/42 (continuation across border) route 17 (spur) route 17 |
| Train line intersections |
| Notes |
| The route is a continuation of Saitama Prefectural Route 42 (26). There is no signage indicating the route as 42, since it is fully duplexed with route 26, and the tendency in Japan is to sign the lower number in the duplex. |