霧に包まれる湿原台地 足元と視界に警戒

Currently, Naeba-san summit is cloudy with visibility under 1km, enveloped in fog. The temperature is 4.9℃, feeling like 2.7℃, with 99% humidity, indicating a strong chill. At the base, it is a light drizzle at 11.9℃. There is a 7℃ temperature difference between the summit and base, meaning the perceived temperature drops significantly with elevation gain.

The forecast for the day also indicates continuous light cloudiness to cloudy conditions, with no expectation of visibility improvement. On the expansive Naeba-san summit plateau, which stretches 4km east to west, there is a very high risk of getting lost due to dense fog. Constantly check your compass and GPS, and proceed carefully to avoid stepping off the boardwalks within the marshland. The ponds and flower fields will not be fully enjoyable under these low visibility conditions.

The ground is generally wet due to high humidity and mist. The boardwalks are slippery, and many areas within the marsh are muddy. Waterproof and breathable rainwear is essential. Carry a quick-drying base layer, a mid-layer such as fleece, and additional warm clothing like a down jacket, along with gloves and a knit cap. Wear them promptly during breaks or when stopping movement. Crampons or chain spikes are not necessary.

Gusts could reach up to 9.9m/s, which is not strong enough to impede movement, but the cold wind will further lower the perceived temperature. Strict vigilance against hypothermia is required. Temperatures will continue to drop in the evening, reaching 1.9℃ at night. Any daytime activity must be undertaken with thorough preparation for poor visibility and cold conditions.