The , or for short, is a private, narrow gauge railway company operating the Kurobe Gorge Main Line along the Kurobe River in the Kurobe gorge area of Toyama Prefecture, Japan. The railway was built to serve the construction of the Kurobe dam for the Kansai Electric Power Company, which was completed in 1963; Kurotetsu was spun off from the power company in June 1971, but remains a wholly owned subsidiary. At its terminus, the Main Line links to Kurobe Senyà  Railway, which is not open to the general public.
, the company operated 25 locomotives, 139 passenger carriages and 204 freight wagons.
The Unazuki - Nekomata section opened in 1926, electrified at 600 VDC and was extended to Keyakidaira in 1937.
The passenger service started in 1953.
As of 2023, there are three employees qualified to do track inspections. These inspections are done monthly, workers walking on foot for stretches to visually inspect that segment of the track, taking around 3 hours. Any variance between the rails of over requires repair. Due to the large number of curves (well over 200) along the route, sections of rails are used instead of longer ones as would be used on a typical railroad. The shorter sections of track therefore have more joints (and more locations for issues to occur), requiring detailed inspections, with a particular attention paid to these joints. At peak times there are 5 trains an hour running on the line; inspections are done when the trains are running, increasing the safety risks for these inspections.
All stations are in Kurobe, Toyama.
Due to a bridge collapse during the 2024 Noto earthquake, all stations past Nekomata are closed as of September 2025. Trains operate as a round-trip between Unazuki and Nekomata, with passengers being able to temporarily alight at the Nekomata terminus.
âÂÂ: Served by passenger trains<br/> â²: Served by passenger trains only during AprilâÂÂMay<br /> â : Temporarily served by passenger trains (typically closed to passengers)<br/> ï½Â: Closed to passengers
The cars are manufactured by Alna Koki. The 2000 class cars have drivers cabs at their front end.
This article incorporates material from the corresponding article in the Japanese Wikipedia