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This 286 km route runs from Yushima Tenmangū to Shinano, passing through Tokyo, Nagano, Gunma, and Saitama. In the past 30 days, 50 bear sightings were reported within 5 km of the route. The past 7 days account for 9 of them. The latest sighting was reported 1 day ago near Annaka 松井田町二軒在家, Gunma.
This is an active bear corridor. Drive through with full caution, but rerouting is the safer choice.
24 places within 1 km of your route, passing through Tokyo, Nagano, Gunma, Saitama.
Annaka 松井田町二軒在家, Gunma
A bear was sighted in Matsuidamachi Matsuida, Annaka City, Gunma Prefecture, around 12:45 on July 30.
Annaka 松井田町松井田, Gunma
A juvenile bear about 1 meter long was spotted along Prefectural Route 43 (Momiji Line) of the Karuizawa–Shimonita route. The mother bear could not be found, but is believed to be hiding nearby.
Shimonita, Gunma
Size: adult (fully grown)
Sakaki, Nagano
Size: juvenile
Sakaki, Nagano
A bear was sighted in Goryo, Matsuidamachi, Annaka City around 8:00 on 2026-07-27.
Annaka, Gunma
Annaka, Gunma
Size: adult
Karuizawa, Nagano
Annaka 松井田町土塩, Gunma
Around 8:20 AM on 2026-07-24, one bear was sighted in Hatachi, Karuizawa Town, Nagano Prefecture.
Karuizawa 大字発地, Nagano
Size: juvenile
Karuizawa, Nagano
Size: Adult
Karuizawa 大字発地, Nagano
A bear was sighted in Mogusa, Karuizawa Town, Nagano Prefecture, around 7:15 a.m. on July 21.
Karuizawa 大字茂沢, Nagano
Size: Adult
Karuizawa 大字茂沢, Nagano
Annaka 松井田町行田, Gunma
One bear was seen moving in Matsuida-cho Gyoda, Annaka City, Gunma.
Annaka 松井田町行田, Gunma
Size: Unknown
Ueda, Nagano
Size: Unknown
Ueda, Nagano
Size: Adult
Ueda 真田町傍陽, Nagano
Size: adult (fully grown)
Karuizawa, Nagano
Size: Adult
Nagano Shobu-ko, Nagano
Around 9:30 on July 13, a bear was sighted in Togura, Chikuma City, Nagano, and was captured.
Chikuma Togura, Nagano
Size: Adult
Chikuma Togura, Nagano
I was riding a motorcycle on a tour, and it was just at the spot where the guardrail goes into the mountain, so I didn't take any photos and the location is not exact. I was heading west and report an approximate location based on my memory that it was a left-hand curve a little past the Megane Bridge parking area, at a place with a white guardrail.
Annaka, Gunma
Size: juvenile
Nagano Ageya, Nagano
Size: Adult
Nagano Togakushi-Toyooka, Nagano
Around 13:10 on 2026-07-10, a bear was sighted in Shiga, Saku City, Nagano Prefecture.
Saku, Nagano
On 2026-07-10 in Shinkoda, Saku City, Nagano, a bear was sighted.
Saku Arakoda, Nagano
A bear was sighted in Uegaya, Nagano City.
Nagano Ageya, Nagano
Size: Unknown
Ueda Sanadamachi-Motohara, Nagano
Size: juvenile
Karuizawa, Nagano
Size: Adult
Karuizawa, Nagano
Size: unknown
Ueda Tonoshiro, Nagano
A bear was sighted in Hatsuji, Karuizawa Town, Nagano, around 10:20 on July 6.
Karuizawa 大字発地, Nagano
Size: juvenile
Nagano Nakazone, Nagano
Tomioka 妙義町上高田, Gunma
Size: adult
Karuizawa, Nagano
Size: Adult
Sakaki Minamijo, Nagano
In a forest in Konabe, Nagano City, a man was accidentally hit in the left shoulder by a hunting rifle while a bear was being culled.
Nagano Konabe, Nagano
On 2026-07-04 afternoon, a bear was sighted in Hosshi, Karuizawa Town, Nagano Prefecture.
Karuizawa 大字発地, Nagano
Shimonita, Gunma
Around 7 PM on July 3, a bear was sighted in Nishinomaki, Shimonita Town.
Shimonita Nishinomaki, Gunma
Around 8:00 on 2026-07-03, a bear was sighted in Hotchi, Karuizawa Town, Nagano Prefecture.
Karuizawa 大字発地, Nagano
Size: adult with cub(s)
Nagano Konabe, Nagano
Size: Adult
Karuizawa, Nagano
A bear was sighted in Matsuida-machi Doshio, Annaka City.
Annaka 松井田町土塩, Gunma
Around 9:00 on 2026-07-17, a bear was sighted in Kashiwabara, Shinano Town, Nagano Prefecture.
Shinano, Nagano
Size: juvenile
Nagano Ageya, Nagano
Size: Adult
Nagano Togakushi-Toyooka, Nagano
A bear fell from the trees around between lift pylons 14 and 15 on the tracking course between Tangram Madarao Hotel and Nojiri Lake Terrace, then ran up the mountain.
Shinano 古海, Nagano
Around 6:30 PM on July 6, a bear was sighted in Kashiwabara, Shinano Town, Nagano Prefecture.
Shinano, Nagano
While traveling on Prefectural Route Myoko Kogen Park Line, a single bear was sighted crossing the road from north to south.
Myoko, Niigata
Peak activity at 7:00 with 4 incidents
Ursus thibetanus japonicus
Safety picks and trail essentials, top-rated on Amazon and Rakuten.
For mountain rescue, call 110 (police). They will coordinate with local rescue teams.
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In the past 30 days, 50 bear sightings were reported within 5 km of the route. The past 7 days account for 9 of them.
The latest sighting was reported 1 day ago near Annaka 松井田町二軒在家, Gunma.
Recent sightings on this route peak around 7:00. Bears are generally most active at dawn and dusk.
This 286 km route runs from Yushima Tenmangū to Shinano, passing through Tokyo, Nagano, Gunma, and Saitama. In the past 30 days, 50 bear sightings were reported within 5 km of the route. The past 7 days account for 9 of them. The latest sighting was reported 1 day ago near Annaka 松井田町二軒在家, Gunma. This is an active bear corridor. Drive through with full caution, but rerouting is the safer choice.
