No major (man-made) dams have been built across the main current of the Shimanto River, known as the “last remaining clear stream.” This means that its vast natural world has been preserved, untouched.
Its abundant currents nurture diverse biological systems, supporting many living creatures such as ayu fish and freshwater shrimp.
Representative traditional fishing methods such as hiburi (fire) fishing and shibazuke (wooden trap) fishing have been carefully passed down, and a rich culture formed from the close coexistence between the people and the river is very much alive.
In summer, the river welcomes the season for natural wild ayu fish, eels, and freshwater shrimp.
Savor these salt-grilled or as tempura in local eateries or on a yakatabune pleasure boat.
Fall is the time for chestnuts and the fragrant citrus fruit “bushukan,” which enhances the taste of dishes with its refreshing acidity. Enjoy seasonal delights nurtured in Shimanto’s seasons!
Don’t forget the Yoshino River that runs through Kochi Prefecture and Tokushima Prefecture as you dynamically enjoy Shikoku’s natural world! The Yoshino River is well known as a spot with some of Japan’s best rapids, and you can ride its swift currents and large waves in an authentic downriver experience. Guided tours are also available, giving peace of mind to beginners. This beautiful landscape formed of valleys weaving between mountains allows you to make the most of both adventure and a dynamic natural world that is different to the serenity of the Shimanto river.
(Oboke Iya Tourist Navigation)https://miyoshi-tourism.jp/rafting/
(Tosa-Reihoku Tourism Association)https://tosareihoku-kanko.com/play/#kawa
The Yoshino River basin is also an area with a unique and long-flourishing culture of indigo dyeing. We recommend experiencing Tokushima’s distinctive history and culture for yourself.
If you want to learn more about the magnificent land and stunning scenic spots in each area of Shikoku, check out our feature on geoparks.
See "Shikoku’s Geoparks: A Complete Guide"
Similar to the submersible bridges over the Shimanto River, buildings rooted in local communities are dotted around each area of Shikoku. You’ll find architecture of all genres and periods, including traditional townscapes and castles, modern art museums and public facilities with a high level of design, and buildings in harmony with nature.
Why not add an architectural perspective to your trip to Shikoku?
The extraordinary clarity of the water is the reason for the beautiful azure color known as Niyodo blue. There are very few impurities in the water, so it strongly reflects only the short-wave blue light in the sunlight, and our eyes see it as blue.
The high level of transparency has come about for several reasons: the water flows rapidly through the precipitous topography, making it difficult for impurities to accumulate; the water temperature is low, preventing the algae that impede transparency from multiplying; and the hard bedrock, a geological feature, means that earth, sand, and mud that cause cloudiness don’t really materialize. On top of this, the riverbed is made up of a blue-green stone called greenschist, which further enhances the azure color. All these conditions come together to create the color of the clear waters of the Niyodo River.
You can enjoy various activities in each season in the Niyodo River area.
In spring, it is popular to hike through Nakatsu Gorge and Yasui Gorge, surrounded by new greenery.
Summer, when the water levels are stable, is the best time for SUP, canoes, and playing in the river.
A little further downriver you’ll find a calm area, close to the three major places to see Niyodo blue, where you can really get yourself moving in this vast natural world and experience the clear steams with your whole body.
Omogo Gorge extends across the southern foot of Mt. Ishizuchi in Ehime Prefecture, the source area of the Niyodo River. Its clear waters and the beauty of its valley make it popular spot!
It offers superlative landscapes of emerald-green waters and massive granite rock faces, and is known as the gateway to climb Mt. Ishizuchi—it is also perfect for walks among nature and viewing crimson fall leaves.
Have a look at our special feature on geoparks too for a trip that will take you around Shikoku’s magnificent topography.
Public transport is limited in the area around the Shimanto River and the Niyodo River, so we recommend accessing it in a car.
Make the most of local gourmet food and sightseeing spots in the area as you drive along the mountain roads of Shikoku and enjoy its spectacular scenery!