霧雨に濡れる巨岩帯。足元に細心の注意

Tomuraushi Summit is clear this morning with visibility over 20km, but light drizzle will begin around 9 AM, intensifying to moderate drizzle throughout the day. While the base is a mild 15.7℃, the summit is significantly colder at 7.5℃, an 8.2℃ difference, and the perceived temperature will drop further when wet.

Daytime high temperatures will remain in the low 9s. With continuous drizzle, ground conditions will become wet. Particularly in areas like the Rock Garden, wet boulders will be extremely slippery, increasing the risk of falls and slips. Exercise extreme caution with every step. Crampons or microspikes are not necessary, but full rain gear is essential.

The perceived temperature starts at 5.8℃ and will hover between 5℃ and 9℃ during the day. A quick-drying base layer, a fleece mid-layer, and a waterproof-breathable outer shell are mandatory. Waterproof gloves are also advisable. Winds will remain light throughout the day, but prolonged exposure to wet conditions increases the risk of hypothermia. Drizzle will continue into the evening, with temperatures dropping further to the low 3s overnight. Given this mountain's challenging long course, be prepared to make an early decision to turn back. While not a sudden weather change like the 2009 incident, prolonged wetness and low temperatures can be life-threatening.