Japan Holiday Tragedy: One Dead, Approximately Twenty-Six Injured in Massive Vehicle Pileup on Kan‑etsu Expressway Amid Heavy Snow-What You Need to Know

Published on December 27, 2025

A deadly crash on one of Japan’s busiest expressways has left one person dead and around 26 others injured after over 50 vehicles collided in heavy snow. The tragic pileup occurred on the Kan‑etsu Expressway, located in Gunma Prefecture, as snow and icy road conditions caused a chain reaction crash just as the holiday travel season began.

The Incident — What Happened

The collision took place late Friday night on 26 December 2025, when two trucks collided in snowy, slippery conditions, blocking lanes and causing a traffic disaster. As vehicles behind the initial crash tried to stop on the slick road, they could not avoid the obstruction, triggering a massive chain reaction that involved more than 50 cars and trucks.

According to local police, one person, a 77‑year‑old woman from Tokyo, was killed in the crash, and 26 others were injured, with five of them in serious condition.

The crash also sparked a fire among the wrecked vehicles, further complicating emergency response efforts. Rescue workers spent hours at the scene, clearing debris and transporting the injured to hospitals.

What Caused the Crash? Snow and Slippery Roads to Blame

The cause of the crash has been attributed to treacherous road conditions following a snowstorm that blanketed the Kan‑etsu Expressway. Authorities confirmed that heavy snow and low visibility contributed to the inability of drivers to react in time. The accident occurred amid a severe weather warning for northern Japan, where snow accumulation had already reached 50–70 cm in some areas.

Japan is experiencing an intense winter this year, and snow warnings for heavy snow, strong winds, and ice remain in place. The Japan Meteorological Agency (JMA) has been actively advising against unnecessary travel in snow-affected regions to avoid the risk of accidents.

Holiday Travel Disruptions Across Japan

This accident is a grim reminder of the dangers of winter driving in Japan, particularly as the country braces for more holiday travel chaos. The Kan‑etsu Expressway, which connects Tokyo to the mountainous regions of Niigata, Nagano, and Hokkaido, is one of Japan’s busiest routes, particularly during the New Year holidays. These hazardous conditions are likely to cause widespread travel disruptions over the coming days as the holiday travel rush continues.

Several major highways and rail services are already facing delays, as snow is expected to persist through the weekend. (Tokyo to Hokkaido train services, including the Shinkansen, have also been delayed or temporarily suspended due to heavy snow).

What Travellers Should Do Now — Stay Safe and Prepared

For those planning to travel through Japan’s snowy regions over the coming days, it’s essential to follow these safety precautions:

1. Monitor Weather Warnings and Road Conditions

Before you travel, check Japan’s official weather services, especially the Japan Meteorological Agency (JMA) website for snow warnings and traffic advisories. It’s crucial to stay up to date on real‑time weather alerts and traffic reports.

2. Allow Extra Time for Travel

Given that heavy snow and ice can cause significant delays, travellers should plan for extra time. Always reconfirm transportation schedules, whether you are flying, taking a train, or driving. Avoid rushing and allow time to account for road closures or delays.

3. Prepare Your Vehicle for Winter Driving

If you plan to drive, ensure your vehicle is equipped for snowy conditions. This includes winter tyres or snow chains, both of which are mandatory in many parts of Japan during the winter months. Carry essential emergency items, including blankets, food, water, and a fully charged phone.

4. Postpone or Rethink Coastal and Ferry Travel

Given the rough seas and high waves forecasted along the Sea of Japan, it is advisable to postpone any coastal travel or ferry crossings until conditions improve. Weather warnings for high winds and waves are in effect for many maritime routes.

5. Stay in Touch with Your Hosts and Service Providers

If you are visiting friends or family or planning any activities, stay in touch with local hosts or tour operators who can provide updates on local conditions and help you plan your activities accordingly.

Final Words on Safety

This tragic incident on the Kan‑etsu Expressway highlights the inherent risks of travel during the winter season. Travellers should stay vigilant and prioritise safety over speed, especially in snowy conditions. While Japan remains one of the safest places to travel, weather conditions can change rapidly, and proper preparation is essential for a safe journey. Always keep up with the latest weather advisories, adjust travel plans if necessary, and remain cautious in severe weather.