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  4. Karuizawa to Mount Asama Hiking Route

Karuizawa to Mount Asama Hiking Route

Hiking · High Risk · 10 km · 2h 17m · 2 stops · 11 sightings · Saved June 17, 2026 · Last updated 14 hours ago
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2
Incidents in last 7 days
11
Incidents in last 30 days
4 days ago
Latest

Safety Summary

This 10 km route runs from Karuizawa to Mount Asama, passing through Nagano and Gunma. In the past 30 days, 11 bear sightings were reported within 5 km of the route. The past 7 days account for 2 of them. The latest sighting was reported 4 days ago near Karuizawa 中軽井沢, Nagano.

At this density of recent sightings, consider rescheduling or choosing a different trail until activity quiets.

Your Route

Route Profile

Highlights Along Your Route (1)

1 places within 1 km of your route, passing through Nagano, Gunma.

Mount Asama
Moderate Risk

Mount Asama

Gunma

346 incidents

Mount Asama
Moderate Risk

Mount Asama

Gunma

346 incidents

Route Timeline

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S
Karuizawa, Nagano
High Risk 10 km 2h 17m 11 sightings within 5 km
Karuizawa 中軽井沢, Nagano

Location: 36.36815° N, 138.59869° E We encountered 1 adult female bear with 2 cubs. The adult bear made a bluff charge toward us (stopped around 5 meters away) while the cubs ran up the hill. They then moved away together.

Karuizawa 中軽井沢, Nagano

4 days ago

Size: adult with cubs

Karuizawa 大字長倉, Nagano

Official ·5 days ago
Karuizawa 中軽井沢, Nagano

Size: Adult

Karuizawa 中軽井沢, Nagano

Official ·1 week ago
Show 8 more

Size: Adult (fully grown)

Karuizawa 中軽井沢, Nagano

Official ·1 week ago
Karuizawa 大字長倉, Nagano

Size: juvenile

Karuizawa 大字長倉, Nagano

Official ·2 weeks ago
Karuizawa 中軽井沢, Nagano

Around 8:20 on 2026-07-24, a bear was sighted in Nagakura, Karuizawa Town, Nagano Prefecture.

Karuizawa 中軽井沢, Nagano

News ·2 weeks ago
Karuizawa 大字長倉, Nagano

Size: Adult

Karuizawa 大字長倉, Nagano

Official ·2 weeks ago
Karuizawa 大字長倉, Nagano

Size: Unknown

Karuizawa 大字長倉, Nagano

Official ·2 weeks ago
Karuizawa 中軽井沢, Nagano

Size: cub (young bear)

Karuizawa 中軽井沢, Nagano

Official ·2 weeks ago
Karuizawa 大字長倉, Nagano

Size: juvenile

Karuizawa 大字長倉, Nagano

Official ·3 weeks ago

Size: adult and cub

Karuizawa, Nagano

Official ·3 weeks ago
G
Mount Asama, Gunma
Total Distance: 10 km

When Are Bears Most Active?

Peak activity at 10:00 with 1 incidents

Asian black bears on your route

Asian Black Bear

Asian Black Bear

Ursus thibetanus japonicus

Range
Honshu, Shikoku
Size
80–120 kg
Active
Dawn & dusk

Sharing space safely

  • ·Make noise as you walk; carry bear spray
  • ·If charged, stand firm and use the spray
  • ·If contact happens, resist firmly. They retreat when met with resistance
  • ·Don't climb. They climb better than you

Safety Checklist

Hiking in bear country

Safety picks and trail essentials, top-rated on Amazon and Rakuten.

Emergency Contacts

110
Police
119
Fire/Ambulance

For mountain rescue, call 110 (police). They will coordinate with local rescue teams.

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Frequently Asked Questions About This Route

How many bear sightings are on this route?

In the past 30 days, 11 bear sightings were reported within 5 km of the route. The past 7 days account for 2 of them.

When and where was the most recent bear sighting near this route?

The latest sighting was reported 4 days ago near Karuizawa 中軽井沢, Nagano.

What time of day are bears most active here?

Recent sightings on this route peak around 10:00. Bears are generally most active at dawn and dusk.

Is this route safe to travel right now?

This 10 km route runs from Karuizawa to Mount Asama, passing through Nagano and Gunma. In the past 30 days, 11 bear sightings were reported within 5 km of the route. The past 7 days account for 2 of them. The latest sighting was reported 4 days ago near Karuizawa 中軽井沢, Nagano. At this density of recent sightings, consider rescheduling or choosing a different trail until activity quiets.

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