Hokkaido Shinkansen at 260 km/h in Seikan Tunnel Over New Year
Dec 30, 2026 – Jan 4, 2027: Hokkaido Shinkansen trains passing the Seikan Tunnel before about 3:30 p.m. run at 260 km/h instead of 160 km/h, cutting travel time by five minutes. Check which trains qualify.

