Kosaka Railway was laid in 1908 between Kosaka Mine and Odate Station to transport goods of Kosaka Mine. It transported a lot of products, ores and passengers, and made a big contribution to modernization of Japan.
After closing Kosaka Mine, Odate-Kosaka Area became a base for recycle industry. However, concentrated sulfuric acid has come to not be produced because of the development of a new furnace, and that changed the transportation from the railway to truck. Finally, Kosaka Railway finished its role and ended in 2009 with a hundred year history.
Akita Prefecture recognized “Regional Resource” as “Old Kosaka Railway” in November 2013. In addition, in 2014, some of Kosaka Railway, sites, vehicles and facilities were transferred to Odate City and Kosaka Town without compensation.