Shiga Kogen is a high-altitude area where the weather changes quickly. Even on routes that are normally open to traffic, sudden closures may occur due to freezing or snowfall depending on weather conditions. Please be sure to check the weather forecast and traffic restrictions in advance whenever possible.
National Route R292 “Shiga-Kusatsu Kogen Route”
Shiga-Kusatsu Kogen Route（From Shiga Kogen Yosaka Gate to Kusatsu Tenguyama Gate）
Current Status: OPEN *Partially Closed
【Passable】Shiga Kogen Yosaka Gate ⇔ Shibutoge, Japan’s Highest National Route Point
【Passable】Shibutoge, Japan’s Highest National Route Point ⇔ Manza Junction
【Passable】Manza Junction ⇔ Manza Onsen ⇔ Kusatsu Onsen (via Manza Toll Highway)
【Not Passable】Manza Junction ⇔ Kusatsu Sesshogawara Gate – Kusatsu Onsen (Route 292)
*Due to volcanic activity at Mt. Shirane, the road between Manza Junction and Kusatsu Sesshogawara Gate is closed.
*Travel between Shiga Kogen and Kusatsu (Gunma Pref.) is possible via the Manza Highway (toll road).
*No pedestrians, bicycles, or motorcycles under 125cc allowed.
★For more information, please call Gunma Pref. Nakanojo Doboku Jimusho (Ph: +81 279-75-3047).
Prefectural Road 502 “Okushiga Kogen Sakae Line”
LOCATION
From Okushiga Gate (Okushiga Kogen) to Nozawa Onsen Village (Incl. Kayano-daira and Akiyamago Village)
CURRENT STATUS
CLOSED
WINTER CLOSURE
Okushiga Kogen Gate to Intersection Gate of Akiyama Forest Road: From 10 November 2025 at 10:00 to 15 May 2026 at 14:00
Intersection Gate of Akiyama Forest Road → Kayano-daira: From 4 November 2025 at 14:00 to 22 May 2026 at 14:00
Intersection Gate of Akiyama Forest Road → Nozawa Onsen: From 4 November 2025 at 14:00 to 29 May 2026 at 14:00
Prefectural Road 66 “Toyonominami Shiga Koen Line”
LOCATION
From From Shiga Kogen Kasagatake Gate to Takayama Village (Yamada Onsen)
CURRENT STATUS
CLOSED
WINTER CLOSURE
From 7 November 2025 at 15:00 to 22 May 2026 at 15:00
