The sleeping express “Hamanasu” was operated by JR Hokkaido, running from Aomori through the Seikan Tunnel to Sapporo. It debuted with the opening of the Seikan Tunnel in 1988 and became popular for its diverse facilities, including B sleeper cars, carpet cars, and Dream Cars (reclining seat cars), offering both reserved and non-reserved seating. However, it was retired in March 2016 with the opening of the Hokkaido Shinkansen.