Kaya railway was established in April 1925 by some promoters and also many supporters of this county. These supporters gave about 300,000yen to fund this railway. Many of them are textile manufacturers of silk cloth called "Tango Chilimen". In December 1926, this company started railway transportation business between Tango-Yamada and Kaya, 5.7km distance, 3ft-6in gauge and a steam power locomotive used. In September 1934, this railway began omnibus transportation business in this county and Miyazu-town. But in 1939, this railway was used for industrial purposes of transporting nickel ore from the mine to factory near the Miyazu bay. After the World War �U, this railway change for the purpose of local transportation.

In 1970s, an increase of family cars caused the decrease of passengers, and this railway closed its own transportation business in May 1985. And the Kaya Railway changed its name to Kaya Kosan in Dec.1985. Kaya Kosan also started in 1959 general constructor business, a omnibus transportation business and sightseeing business. Heritage railway is one branch of sightseeing industry.