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This 164 km route runs from Nirasaki to Maebashi, passing through Yamanashi, Gunma, and Nagano. In the past 30 days, 28 bear sightings were reported within 5 km of the route. The past 7 days account for 5 of them. The latest sighting was reported 5 days ago near Annaka 上後閑, Gunma.
At this density of recent sightings, consider rescheduling or choosing a different trail until activity quiets.
3 places within 1 km of your route, passing through Yamanashi, Gunma, Nagano.
Annaka 上後閑, Gunma
A bear was sighted in Kamigokan, Annaka City, Gunma Prefecture, on 2026-08-01.
Annaka 上後閑, Gunma
Around 1:00 on July 31, a bear was sighted in Niibori, Matsuida-machi, Annaka City.
Annaka 松井田町新堀, Gunma
Annaka 松井田町新堀, Gunma
Size: Adult (fully grown)
Karuizawa, Nagano
A resident living in the Kurosawa area of Takekawa Town reported that they appear in security camera footage. The person entered the yard from the Takekawayamataka Line 35 city road on the south side of their house and walked north through the yard.
Hokuto Mukawacho-Kurosawa, Yamanashi
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
Annaka 松井田町人見, 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
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: adult (fully grown)
Koumi, Nagano
Around 7:00 on July 16, a bear was sighted in Chiyosato, Koumi Town, Nagano Prefecture.
Koumi 大字千代里, Nagano
Size: adult (fully grown)
Karuizawa, 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
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
Size: juvenile
Karuizawa, Nagano
Peak activity at 8:00 with 3 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, 28 bear sightings were reported within 5 km of the route. The past 7 days account for 5 of them.
The latest sighting was reported 5 days ago near Annaka 上後閑, Gunma.
Recent sightings on this route peak around 8:00. Bears are generally most active at dawn and dusk.
This 164 km route runs from Nirasaki to Maebashi, passing through Yamanashi, Gunma, and Nagano. In the past 30 days, 28 bear sightings were reported within 5 km of the route. The past 7 days account for 5 of them. The latest sighting was reported 5 days ago near Annaka 上後閑, Gunma. At this density of recent sightings, consider rescheduling or choosing a different trail until activity quiets.
