Tokyo — Japan’s government-appointed panel has issued detailed guidelines to prepare for a potential large-scale eruption of Mount Fuji, the country’s tallest and most iconic volcano. The report, released on March 21, outlines measures to mitigate the impact of volcanic ashfall, which could severely disrupt life in Tokyo and surrounding areas.

Experts warn that Mount Fuji, which last erupted in 1707, could release up to 490 million cubic meters of ash in a major eruption.

This ashfall could blanket regions like Tokyo, Kanagawa, and Shizuoka with up to 30 centimeters of ash, causing widespread infrastructure damage and health risks. The panel emphasized that such an event could rival the devastation caused by the 2011 earthquake and tsunami.

The guidelines categorize responses into four stages based on ash accumulation. Residents in areas with less than 30 centimeters of ash are advised to shelter at home, stock up on two weeks’ worth of supplies, and avoid unnecessary travel.

In contrast, those in regions expecting over 30 centimeters of ash should evacuate due to risks like collapsing wooden structures under wet ash. Individuals requiring medical care or dialysis are urged to evacuate even at lower ash levels.

The report also highlights potential disruptions to power, water quality, transportation, and communication networks. Local governments are tasked with securing evacuation routes and maintaining critical infrastructure. The panel stressed the importance of disseminating clear information and forecasts to help residents prepare effectively.

Professor Emeritus Fujii Toshitsugu from the University of Tokyo, who led the panel, urged immediate action to prepare for this unprecedented disaster scenario.

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Tags: Japan, Mount Fuji, Volcanic Eruption, Tokyo, Disaster Preparedness,
Ashfall, Evacuation Plans, Infrastructure Damage, Volcanology