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.
Navigate the powerful Tone River on a guided group raft. Suitable from age 6.
Descend waterfalls, slide natural chutes, and explore hidden gorges. Ages 12+.
Experience Gunma's two signature adventures in a single unforgettable day (saves ¥2,000 per adult vs separate booking). Our team calls you to craft your schedule.
Adult
¥10,000
per person
Child
¥6,000
per person
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
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
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.
17 minutes by car from Numata Station. Free parking available at our 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
RaftingGunma, in Japan's mountainous interior, is home to the powerful Tone River. Learn why it offers some of Japan's finest whitewater rapids and why Dream Adventure is the team to guide you.
AdventurePlanning a trip to Gunma? Let’s compare our two most popular activities—Whitewater Rafting and Canyoning—to help you choose the perfect adventure.
Gear GuidePreparing for a whitewater rafting trip on the Tone River is easier than you think. Learn exactly what gear is provided and what essentials you need to bring.
Submit your booking request online. Our team calls you to confirm. Pay on arrival — no payment required online.
Book Your Adventure“Wow its very nice rafting 🛶🛶”
April Chepang
Japan
“It was some seriously intense rafting! 👍 You all should definitely check it out. 🙏🏻🫡”
Nature Vlog Nawaph
Vlogger
“If you're looking for rafting in Gunma, this is a fantastic choice. Great service and an unforgettable experience.”
pratima chhetri
Japan
“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
“Wow its very nice rafting 🛶🛶”
April Chepang
Japan
“It was some seriously intense rafting! 👍 You all should definitely check it out. 🙏🏻🫡”
Nature Vlog Nawaph
Vlogger
“If you're looking for rafting in Gunma, this is a fantastic choice. Great service and an unforgettable experience.”
pratima chhetri
Japan
“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
