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Japan’s Ministry of Land, Infrastructure, Transport and Tourism (MLIT) and Hokkaido Railway Company (JR Hokkaido) announced that, for seven days over the year-end/New Year holiday period, the Hokkaido Shinkansen will operate at 260 km/h inside the Seikan Tunnel.
The implementation dates are from December 30 to January 5, 2026. Within the approximately 54-kilometer section of the Seikan Tunnel, trains will run at 260 km/h instead of the current 160 km/h, cutting travel time by about five minutes. From the first train until around 3:30 p.m., a total of 15 services (seven upbound and eight downbound) will be subject to the change. On December 30 only, from the first train until around noon, a total of 10 services (four upbound and six downbound) will be affected. On December 31 and January 1 and 5, a total of 14 services (seven in each direction) will be included.
Accordingly, timetable changes will be made for some Hakodate Liner trains that connect with the Shinkansen, as well as for some Shinkansen services that stop at Kikonai Station.