Heavy snow piles up in northern and western JapanーNHK WORLD-JAPAN NEWS

Key Concepts

• Japan Sea Polar Air Mass Conversion Zone: A meteorological phenomenon causing heavy snowfall in specific regions of Japan.
• Hokuriku Region: A region in central Japan heavily affected by the current snowfall.
• Kinki Region: A region in western Japan also experiencing significant snowfall.
• Shinkansen: Japan’s high-speed bullet train, utilized as an alternative transportation method during disruptions.
• Snowfall Accumulation Forecasts: Predicted amounts of snowfall in specific prefectures over defined periods.

Heavy Snowfall Disrupts Travel in Northern & Western Japan

A significant winter pressure system is currently impacting northern and western Japan, resulting in substantial snowfall and widespread travel disruptions. The Japan Meteorological Agency (JMA) attributes the heavy snowfall to a “Japan Sea polar air mass conversion zone,” which developed active snow clouds over the Hokuriku and Kinki regions from Wednesday evening through Thursday morning. Residents of Ishikawa and Shika prefectures were specifically advised to remain vigilant during this period. This event is notable as one resident stated, “There’s usually heavy snow once or twice a year, but this is the first we’ve had in a while.”

Regional Snowfall Forecasts & Impacts

The severe weather is predicted to persist until approximately Sunday. Specific snowfall accumulation forecasts indicate Nigata Prefecture may receive up to 80 centimeters of snow within a 24-hour period ending Friday evening. The Tohoku and Hokuriku regions are forecast to experience up to 70 centimeters, while the Chugoku region could see accumulations of 40 centimeters. These forecasts directly correlate with reported travel difficulties. One individual traveling from Osaka by motorcycle expressed being stranded due to the excessive snowfall, stating, “I rode a motorcycle from Osaka, but now there's too much snow to get back.”

Transportation Disruptions & Commuting Challenges – Nagaoka City Report

NHK World’s Mitsui Shoko reported from Nagaoka City, Nigata Prefecture, where 26 centimeters of snow had already fallen as of Wednesday, with continued snowfall. The primary impact observed was on transportation. Local train services experienced cancellations, forcing commuters to seek alternative routes. A woman interviewed explained she was compelled to utilize the Shinkansen bullet train to reach a hospital appointment instead of her usual local train. Similar experiences were reported by students and others with appointments in Nigata, who opted for the Shinkansen due to uncertainty regarding travel times by car.

While some train services have been restored, further cancellations are anticipated for the evening, and significant snow removal efforts are ongoing. Residents described snow shoveling as a “daily chore” expected to continue for several days.

Official Warnings & Ongoing Monitoring

Weather officials are urging the public to stay informed about the latest weather conditions, anticipating continued snowfall through Sunday. As Mitsui Shoko concluded her report, the emphasis remained on preparedness and monitoring of evolving conditions.

Technical Terms:

• Polar Air Mass: A large body of cold, dry air originating in polar regions.
• Conversion Zone: In this context, an area where cold air from the polar regions interacts with warmer, moist air over the Sea of Japan, leading to significant snowfall.
• Shinkansen (Bullet Train): A network of high-speed railway lines in Japan, known for its punctuality and efficiency.