This map covers areas at risk from lava flows, volcanic bomb and lapilli fallouts , pyroclastic flows, and mudflows from melting snow. Other dangers, such as volcanic ash, are likely to occur as well.

Climbing Mount Fuji in 2026 carries several physical and environmental risks, most notably altitude sickness (sorayama), as the summit reaches 3,776 meters. Because many climbers attempt "bullet climbing"—ascending through the night without sleep—the risk of exhaustion and disorientation is high. Weather conditions are notoriously volatile; even in peak summer, summit temperatures can drop to near freezing with wind gusts exceeding 80 km/h, leading to hypothermia for under-prepared hikers. The volcanic terrain consists of loose scoria and rock, making slips and falls common, particularly on the steep descent. To mitigate these risks, authorities in 2026 have implemented a 4,000-person daily limit on the popular Yoshida Trail and a mandatory entry fee to fund safety marshals and medical stations, which are essential for those who find themselves caught in the frequent whiteouts or summer thunderstorms.