Tateyama Sabō Erosion Control Works Service Train

It is operated by the Tateyama Mountain Area Sabō Office, which belongs to the Hokuriku Regional Development Bureau of the Ministry of Land, Infrastructure and Transport.

The line transports materials and workers for the construction/conservation of erosion control facilities of Jōganji River, such as dams.

This is one of few Japanese railways, or possibly the only surviving one, to use 2 ft (610 mm) narrow gauge track.

In 1926, the Home Ministry started to construct erosion control facilities for the river, including the railway line.

Six liaison offices (equivalent to stations) are located in Tateyama, Toyama:[citation needed] Equipment roster as of May 2006.

Nonetheless, railfans still find it difficult to ride the line, since they have to book in advance and win a lottery to join the tour, which is often cancelled due to bad weather.