The Towada Kankō Electric Railway Line (十和田観光電鉄線, Towada Kankō Dentetsu-sen) was a railway route operated by Towada Kankō Electric Railway (Totetsu).

In 1951, the line was fully electrified and the track gauge was expanded to 1,067 mm (3 ft 6 in).

A single direction Automatic Block Signal control system was implemented from December 16, 1971.

The Towadashi terminus was rebuilt in 1985 to include a shopping complex.

A new automatic train stop (ATS) system was implemented from October 1, 2002.