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This 45 km route runs from Karuizawa to Mount Kusatsu-Shirane, passing through Nagano and Gunma. In the past 30 days, 54 bear sightings were reported within 5 km of the route. The past 7 days account for 10 of them. The latest sighting was reported 1 day ago near Naganohara Kitakaruizawa, Gunma.
This is an active bear corridor. Rerouting or rescheduling your hike is strongly advised.
Naganohara Kitakaruizawa, Gunma
Naganohara, Gunma
Tsumagoi, Gunma
Tsumagoi Mihara, Gunma
A bear was sighted in Kamahara, Tsumagoi Village, Gunma on the morning of 2026-06-22.
Tsumagoi Omae, Gunma
Tsumagoi, Gunma
Tsumagoi Mihara, Gunma
Naganohara, Gunma
Around 2:00 PM on June 19, a bear was sighted in Kita-Karuizawa, Naganohara Town.
Naganohara Kitakaruizawa, Gunma
Tsumagoi Saikubo, Gunma
Size: adult and cub
Karuizawa 大字長倉, Nagano
Size: cub (juvenile)
Karuizawa 大字長倉, Nagano
Size: adult
Karuizawa 大字追分, Nagano
Size: Adult
Karuizawa, Nagano
Tsumagoi Imai, Gunma
Tsumagoi Kanbara, Gunma
Naganohara, Gunma
Around 05:30 on 2026-06-16, a bear was sighted in Kita-Karuizawa, Naganohara Town, Gunma Prefecture.
Naganohara Kitakaruizawa, Gunma
Size: Adult
Karuizawa 大字追分, Nagano
Size: Unknown
Karuizawa 大字長倉, Nagano
Tsumagoi, Gunma
Naganohara, Gunma
Naganohara, Gunma
Around 4:00 PM on 2026-06-15, a bear was sighted in Kitasaruigawa, Naganohara Town, Gunma Prefecture.
Naganohara Kitakaruizawa, Gunma
Around 17:45 on 2026-06-14, a bear was sighted in Nagakura, Karuizawa Town, Nagano Prefecture.
Karuizawa 中軽井沢, Nagano
Tsumagoi Omae, Gunma
Naganohara Kitakaruizawa, Gunma
Tsumagoi Imai, Gunma
Naganohara, Gunma
Around 14:15 on 2026-06-10, a bear was sighted in Kita-karuizawa, Naganohara Town.
Naganohara Kitakaruizawa, Gunma
Tsumagoi, Gunma
Size: Adult
Karuizawa 大字長倉, Nagano
A bear was sighted in Otsu, Naganohara Town, Gunma Prefecture.
Naganohara Haneo, Gunma
Size: adult (fully grown)
Karuizawa 大字長倉, Nagano
Size: Adult
Karuizawa, Nagano
Size: juvenile
Karuizawa 中軽井沢, Nagano
Karuizawa, Nagano
Naganohara Okuwa, Gunma
A bear was sighted in Nagakura, Karuizawa Town, around 9:30 AM on June 5.
Karuizawa 中軽井沢, Nagano
Size: Adult
Karuizawa, Nagano
Naganohara, Gunma
Size: adult with cub
Karuizawa, Nagano
On 2026-06-02 around noon, a bear was sighted in Karuizawa, Karuizawa Town, Nagano Prefecture.
Karuizawa 大字軽井沢, Nagano
Size: Adult (fully grown)
Karuizawa 大字追分, Nagano
Tsumagoi, Gunma
One bear was sighted in Karuizawa, Karuizawa Town; the area has nearby homes and the bear was about 1 meter long.
Karuizawa 中軽井沢, Nagano
Tsumagoi Kanbara, Gunma
Tsumagoi, Gunma
Size: adult
Karuizawa 大字長倉, Nagano
Size: Adult (fully grown)
Karuizawa 大字長倉, Nagano
Size: adult (fully grown)
Karuizawa 大字長倉, Nagano
Size: adult
Karuizawa 大字長倉, Nagano
Around 4:00 PM on May 28, a bear was sighted in Nagakura, Karuizawa Town.
Karuizawa 中軽井沢, Nagano
Size: Adult
Karuizawa 大字長倉, Nagano
Peak activity at 9:00 with 5 incidents
Ursus thibetanus japonicus
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For mountain rescue, call 110 (police). They will coordinate with local rescue teams.
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In the past 30 days, 54 bear sightings were reported within 5 km of the route. The past 7 days account for 10 of them.
The latest sighting was reported 1 day ago near Naganohara Kitakaruizawa, Gunma.
Recent sightings on this route peak around 9:00. Bears are generally most active at dawn and dusk.
This 45 km route runs from Karuizawa to Mount Kusatsu-Shirane, passing through Nagano and Gunma. In the past 30 days, 54 bear sightings were reported within 5 km of the route. The past 7 days account for 10 of them. The latest sighting was reported 1 day ago near Naganohara Kitakaruizawa, Gunma. This is an active bear corridor. Rerouting or rescheduling your hike is strongly advised.
