濃霧に包まれ視界不良。濡れた岩稜に足元注意

The summit of Mt. Tomuraushi currently experiences cloudy conditions with a temperature of 5.2°C and a feels-like temperature of 3°C. The base reports light drizzle at 11.8°C. Dense fog blankets the summit area, limiting visibility to less than 1km, coupled with high humidity at 94%. Light drizzle is expected to continue intermittently throughout the day, with temperatures rising to 7.9°C before dropping to 1.9°C overnight.

This dense fog significantly elevates the risk of getting lost, a known hazard on Mt. Tomuraushi. Navigating through areas like the Rock Garden and around Kitama and Minaminuma, with their numerous large boulders, becomes extremely challenging in poor visibility. Wet rock surfaces are slippery, increasing the risk of falls and slips. Proceed with extreme caution, constantly verifying your position with a map, compass, and GPS.

Layering should include a wicking base layer, a mid-layer such as fleece, and essential waterproof and breathable outer shell jacket and pants. With single-digit temperatures, rain, and wind, the perceived temperature will be even lower, necessitating strict vigilance against hypothermia due to wet clothing. Carry an insulating layer like a lightweight down or synthetic jacket, gloves, and a warm hat.

Ground conditions are generally wet and muddy, with numerous puddles and boggy sections. Crampons or microspikes are not required, but highly waterproof hiking boots are essential. Given the long and challenging nature of this route, be prepared to make a judicious decision to turn back if conditions deteriorate or progress slows.