Doai Station
Lines. Doai Station is served by the Joetsu Line, and lies from the starting point of the line at . Station layout. Doai Station is unusual in that it has two single side platforms, one of which is elevated, and the other is located underground within the Shin-Shimizu Tunnel. The station is unattended. The underground platform for the northbound trains (to and ) is located underground, in the middle of the long Shin-Shimizu Tunnel. It is only reachable by stairs, as there are no elevators or escalators. It takes ten minutes to walk the 486 steps from the  ticket gate to the platform. The above-ground platform for the southbound trains (to ) is at ground level. History. The station opened on 19 December 1936. With the privatization of Japanese National Railways (JNR) on 1 April 1987, the station came under the control of JR East. In popular media. The climb up the steps from the underground platform features at the start of the novel, NHK dramatization and movie versions of "Climber's High" by Hideo Yokoyama.