Cassiopeia is a bed special express train to which East Japan Railway, the IGR Iwate Milky Way railway, and a blue forest railway and Hokkaido Railway operate between Ueno Station and Sapporo Station via Touhoku Main Line, the Iwate Milky Way railway line, and a blue forest railway line, the Tsugaru Channel line, the Hakodate main line, the Muroran main line, and the Chitose line. EF510 pulls between Ueno and Aomori.