JR Hokkaido to Restore Muroran Line Service Following Severe Storm Damage

Southern Hokkaido Rail Connectivity Restored

JR Hokkaido has confirmed that train operations on the Muroran Line will resume starting with the first service on the morning of September 10, 2026. The suspension began on August 27 after intense rainfall triggered widespread infrastructure failure across southern Hokkaido.

The weather event caused critical damage to the railway's physical integrity, specifically resulting in the wash-away of track foundations, flooding of rail beds, and multiple mudslides. These conditions rendered the line unsafe for passenger transit, necessitating a complete shutdown for emergency inspections and engineering repairs.

The restoration focuses on the critical section between Shizukari and Koboro stations, which suffered the most significant structural impact.

Emergency Response and Passenger Mitigation

To maintain regional mobility during the outage, JR Hokkaido implemented a multi-tiered contingency plan. This included the deployment of substitute bus services operating between Toya and Oshamanbe stations to bridge the gap in the network.

Recognizing the pressure on alternative routes, the operator also increased capacity on the Hakodate Line. On September 8 and 9, JR Hokkaido added an extra round trip of the Limited Express Niseko service.

These additional trains utilized the 261 Series 5000 Series “Lavender” trainsets, operating between Sapporo and Hakodate with a strictly all-reserved seating configuration to manage passenger volume.

Muroran Line Recovery Timeline

Date	Development
August 27, 2026	Heavy rainfall causes severe railway infrastructure damage
August 27 onward	Inspections conducted for track wash-outs, flooding, and mudslides
September 8–9, 2026	Supplemental Limited Express Niseko services operated
September 10, 2026	Full service resumes between Shizukari and Koboro

Impact on Regional Tourism and Transit

The Muroran Line serves as a vital artery for southern Hokkaido, supporting a diverse mix of domestic and international travelers, business commuters, and local residents. For tourists utilizing rail passes, the line is essential for accessing coastal regions and hot spring destinations.

The ability of JR Hokkaido to restore service within two weeks underscores the necessity of rapid-response maintenance in a region prone to volatile weather. For travelers planning autumn itineraries, the reopening ensures that precise connections between hotels and sightseeing hubs are once again viable.

Limited Express Niseko Supplemental Service Details

Service	Specification
Train Name	Limited Express Niseko
Operation Dates	September 8–9, 2026
Route	Sapporo–Hakodate via Hakodate Line
Train Model	261 Series 5000 Series Lavender
Seating Policy	All Reserved

Key Takeaways

• Reopening Date: Service resumes September 10, 2026, between Shizukari and Koboro.
• Primary Cause: Heavy rain on August 27 led to track foundation wash-outs and mudslides.
• Interim Solutions: Substitute buses (Toya to Oshamanbe) and extra Limited Express Niseko trips were utilized.
• Infrastructure Focus: Rigorous safety inspections were mandatory before the restart to meet Japan's strict rail safety standards.

FAQ

When does the Muroran Line restart? Services between Shizukari and Koboro stations resume from the first train on September 10, 2026.

What caused the service suspension? Extreme rainfall on August 27 caused flooding, mudslides, and the washing away of the railway track bed.

Were there alternative travel options during the closure? Yes, JR Hokkaido provided substitute buses between Toya and Oshamanbe and added extra Limited Express Niseko services on September 8–9.

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