| Tateyama Tunnel Trolleybus | |
|---|---|
 | |
| Overview | |
| Locale | Toyama Prefecture, Japan |
| Termini | |
| Service | |
| Type | Trolleybus in exclusive tunnel |
| System | Tateyama Kurobe Alpine Route |
| Operator(s) | Tateyama Kurobe Kankō Company |
| Ridership | 735,000 (annual, 2002)[1] |
| History | |
| Opened | April 1971 |
| Technical | |
| Line length | 3.7 km (2.3 mi) |
| Highest elevation | 2,450 m (8,040 ft) |
The Tateyama Tunnel Trolleybus (立山トンネルトロリーバス, Tateyama Tonneru Tororībasu), officially the Trolleybus Line (無軌条電車線, Mukijō Densha-sen), is a Japanese trolleybus line in Tateyama, Toyama, operated by the Tateyama Kurobe Kankō Company. The line is entirely underground (in tunnel), including both termini. The line is a part of the Tateyama Kurobe Alpine Route, a sightseeing route to the Kurobe Dam that also includes bus, funicular and aerial tramway lines.
It is the last remaining trolleybus line in Japan, following the conversion of the Kanden Tunnel Trolleybus line to battery operation in November 2018.[2] It is also the last remaining right-hand drive trolleybus line in the world. The trolleybuses are planned to be retired at the end of the 2024 season, and battery-electric buses will replace them at the beginning of the 2025 season.[3]