Gunma Rafting & Outdoor Activities on the Tone River
World-class river rafting and canyoning in the heart of Gunma Prefecture.
Dream Adventure is an outdoor tour operator based on the Tone River in Numata, Gunma, Japan, running whitewater rafting and canyoning trips. Rafting is open from age 6 and canyoning from age 12. A full-day combo of both is ¥10,000 for adults. The base is about two hours by car from central Tokyo, with free parking, and operates from April to October.
Our Gunma Rafting & Canyoning Tours
River Rafting
Navigate the powerful Tone River on a guided group raft. Suitable from age 6.
Canyoning
Descend waterfalls, slide natural chutes, and explore hidden gorges. Ages 12+.
Ultimate Full-Day Gunma Adventure
Rafting & Canyoning Combo Package
Experience Gunma's two signature adventures in a single unforgettable day. Our team will call to craft your perfect custom schedule.
Adult
¥10,000
per person
Child
¥6,000
per person
Daily Tour Schedule & Departures
Three daily departures — our team will confirm your exact time when we call.
Check Availability9:00 AM
Daily departure
11:30 AM
Daily departure
1:30 PM
Daily departure
Safety Protocols for Gunma Outdoor Tours
Your safety is our absolute priority. All activities are led by thoroughly trained professional guides.
Experienced professional guides on every tour
All equipment provided and inspected daily
Guides trained in water rescue and first aid
Weather and river level monitoring
Full safety briefing before every departure
Best Season for Tone River Rafting
Rafting on the Tone River in Gunma runs from April through October. The spring snowmelt (April–June) offers extreme Grade 4 white water, while the summer and autumn months (July–October) provide calmer, scenic waters perfect for families and first-timers.
Access to Our Gunma Base
17 minutes by car from Numata Station. Free parking available at our base.
Guest Testimonials & Adventure Reviews
“Had a mind blowing fun..first time experience, little bit scared at first but the guide made the ride smoothe.. must say you have the most experienced guide..will visit with my work friends again. Thanks Dream Adventure for the terrific experience.”
Yozen Maharjan
Local Guide
“Its nice and smooth booking system.”
Dilip Chhetri
Nepal
“Had a mind blowing fun..first time experience, little bit scared at first but the guide made the ride smoothe.. must say you have the most experienced guide..will visit with my work friends again. Thanks Dream Adventure for the terrific experience.”
Yozen Maharjan
Local Guide
“Its nice and smooth booking system.”
Dilip Chhetri
Nepal
Access to Gunma Outdoor Base
We're located in Numata, Gunma Prefecture — 17 minutes by car from Numata Station.
17 minutes by car from Numata Station, or drive via Kan-Etsu Expressway.
View on Google Maps
Book Your Gunma Rafting & Canyoning Tour Today
Submit your booking request online. Our team calls you to confirm. Pay on arrival — no payment required online.
Book Your Adventure