Twilight Express is running in the Hokkaido by two-car diesel locomotive. To enter Honshu, Japanese main island, from Hokkaido, the train passes through the Seikan Tunnel. Seikan Tunnel is the longest tunnel in the world today. However, the future will be overtaken by the Gotthard Base Tunnel in Switzerland. It is illuminated green light in the center of the Seikan Tunnel. From right here, leave hokkaido.