At 2,172 meters, it is the highest national highway point in Japan.
The route segment is famously part of the 'Romantic Road' of Japan.
The road borders the active volcanic zone of Mount Kusatsu-Shirane.
Snow walls often reach several meters in height when the road reopens in late spring.
The temperature here is typically 10-15 degrees Celsius lower than in the surrounding valleys.
The highest point of Japan's national road network is located at an elevation of 2,172 meters on the Shibutoge Pass, straddling the border of Gunma and Nagano prefectures along National Route 292. This site marks the zenith of the Shiga-Kusatsu Kogen Route, a high-altitude mountain pass known for its volcanic landscape and sweeping vistas. The area is situated within the Joshin'etsu-kogen National Park, characterized by its alpine vegetation and proximity to Mount Kusatsu-Shirane. Due to the extreme altitude and heavy snowfall, the pass remains inaccessible to vehicles during the winter and early spring months. Visitors often experience significant temperature drops compared to the base of the mountains, even in the height of summer. The site is a primary waypoint for motorists and cyclists traversing the route between Kusatsu Onsen and the Shiga Kogen highlands.
The official monument marker located at the Shibutoge Pass summit with the mountain range in the background.
Bring a windproof jacket even in mid-summer, as high-altitude winds are constant.
Check road status portals before departing, as the pass frequently closes due to volcanic activity or weather conditions.
Monitor your vehicle's fuel level, as service stations are extremely sparse along this high-mountain stretch.
Attempting to visit during late autumn or winter months, as the road is strictly closed to all traffic.
Closed from mid-November until late April due to heavy snowfall and volcanic risk.
