The Ultimate Guide to Rafting in Gunma: Japan's Finest Whitewater

Gunma's Numata area is widely considered one of the finest whitewater rafting destinations in Japan. Thanks to the powerful currents of the Tone River, adventure seekers from Tokyo and beyond travel here for world-class rapids, stunning mountain scenery, and unforgettable thrills.

Why Choose the Tone River?

The Tone River (Tone-gawa) is one of Japan's largest and most famous rivers. During the spring months, the melting snow from the Japanese Alps transforms the river into a roaring, Grade 4 whitewater playground. Whether you are an adrenaline junkie looking for extreme drops or a nature lover wanting a scenic summer float, the Tone River delivers.

What to Expect on a Dream Adventure Tour

At Dream Adventure, safety and premium experiences are our top priorities. Our thoroughly trained professional guides will navigate you through the best sections of the river. We offer convenient, hard-locked departure times at 9:00 AM, 11:30 AM, and 1:30 PM to fit your travel schedule perfectly. All essential gear—including premium wetsuits, helmets, and life jackets—is provided.

The Ultimate Combo: Rafting + Canyoning

Why stop at just rafting? To get the absolute most out of your Gunma trip, our Rafting & Canyoning Combo Package allows you to conquer the river in the morning and slide down natural waterfalls in the afternoon. It is the ultimate full-day Japan outdoor experience.