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  4. Koshu to Hirose River Drive

Koshu to Hirose River Drive

Driving · High Risk · 151 km · 2h 20m · 2 stops · 13 sightings · Saved May 30, 2026 · Last updated 12 hours ago
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1
Incidents in last 7 days
13
Incidents in last 30 days
6 days ago
Latest

Safety Summary

This 151 km route runs from Koshu to Hirose River, passing through Yamanashi, Gunma, Kanagawa, Saitama, and Tokyo. In the past 30 days, 13 bear sightings were reported within 5 km of the route. The past 7 days account for 1 of them. The latest sighting was reported 6 days ago near Tsuru Asahisoshi, Yamanashi.

At this density of recent sightings, be ready to brake at any moment and avoid stopping in flagged stretches.

Your Route

Route Profile

Highlights Along Your Route (4)

4 places within 1 km of your route, passing through Yamanashi, Gunma, Kanagawa, Saitama, Tokyo.

Lake Sagami
Low Risk

Lake Sagami

Kanagawa

737 incidents

Hachiōji Castle
Low Risk

Hachiōji Castle

Tokyo

792 incidents

Tokyo Summerland
Low Risk

Tokyo Summerland

Tokyo

770 incidents

Hirose River
Low Risk

Hirose River

Gunma

67 incidents

Lake Sagami
Low Risk

Lake Sagami

Kanagawa

737 incidents

Hachiōji Castle
Low Risk

Hachiōji Castle

Tokyo

792 incidents

Tokyo Summerland
Low Risk

Tokyo Summerland

Tokyo

770 incidents

Hirose River
Low Risk

Hirose River

Gunma

67 incidents

Route Timeline

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S
Koshu, Yamanashi
High Risk 151 km 2h 20m 13 sightings within 5 km
Tsuru Asahisoshi, Yamanashi

Tsuru Asahisoshi, Yamanashi

Official ·6 days ago
Otsuki Hatsukarimachi-Shimohatsukari, Yamanashi

Otsuki Hatsukarimachi-Shimohatsukari, Yamanashi

Official ·1 week ago
Tokyo Hirai, Tokyo

Around 8:20 PM on July 26, a bear-like animal was sighted in Hirai, Hinode Town, Tokyo.

Tokyo Hirai, Tokyo

News ·1 week ago
Show 10 more
Otsuki Nigiokamachi-Iwadono, Yamanashi

Otsuki Nigiokamachi-Iwadono, Yamanashi

Official ·1 week ago

Akiruno Sannai, Tokyo

Official ·1 week ago

A mother bear and two cubs were sighted near a community center in Asari, Nigoka-cho, Otsuki City.

Otsuki Nigiokamachi-Asari, Yamanashi

News ·2 weeks ago
Otsuki Nigiokamachi-Asari, Yamanashi

Otsuki Nigiokamachi-Asari, Yamanashi

Official ·2 weeks ago

I was walking from Iwadono Mountain toward Chigo-Otoshi. Just as I was about to reach Chigo-Otoshi, I encountered a bear cub.

Otsuki Nigiokamachi-Yurigaoka, Yamanashi

2 weeks ago
Otsuki Nigiokamachi-Yurigaoka, Yamanashi

A bear was sighted in Shigenokamachi Kozuse, Otsuki City.

Otsuki Nigiokamachi-Yurigaoka, Yamanashi

News ·2 weeks ago

Around 19:20 on July 12, a bear-like animal was sighted in Kurosawa 3-chome, Ome City.

Ōme Kurosawa, Tokyo

News ·3 weeks ago

Koshu Katsunumacho-Kamiiwasaki, Yamanashi

Official ·3 weeks ago

Tsuru Shimoya, Yamanashi

Official ·3 weeks ago

Hachioji, Tokyo

Official ·3 weeks ago
G
Hirose River, Gunma
Total Distance: 151 km

When Are Bears Most Active?

Peak activity at 12:00 with 3 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, 13 bear sightings were reported within 5 km of the route. The past 7 days account for 1 of them.

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

The latest sighting was reported 6 days ago near Tsuru Asahisoshi, Yamanashi.

What time of day are bears most active here?

Recent sightings on this route peak around 12:00. Bears are generally most active at dawn and dusk.

Is this route safe to travel right now?

This 151 km route runs from Koshu to Hirose River, passing through Yamanashi, Gunma, Kanagawa, Saitama, and Tokyo. In the past 30 days, 13 bear sightings were reported within 5 km of the route. The past 7 days account for 1 of them. The latest sighting was reported 6 days ago near Tsuru Asahisoshi, Yamanashi. At this density of recent sightings, be ready to brake at any moment and avoid stopping in flagged stretches.

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