The Niyodogawa is one of Japan’s clearest rivers, celebrated for a colour so vivid it has its own name: ‘Niyodo Blue’, a luminous turquoise that glows in the sunlight where the water runs deep and pure over pale stones. Flowing from the mountains of central Kochi, it is dotted with jewel-like spots — the pool beneath Nakatsu Gorge, the astonishing clarity of Niko-buchi pool, waterfalls and swimming holes framed by forested slopes. In the warm months it is a wonderful place to swim, paddle and cool off in some of the most beautiful river water in the country, while its scenery and light make it a favourite of photographers. It is nature at its most refreshing.
🗓️ At a Glance
| Location | Niyodogawa / Ino, Kochi |
| Hours | Open river; daylight |
| Admission | Free; some parking fees |
| Time needed | Half day |
| Best time | Summer for swimming; clear days |
What to See & Do
- The luminous turquoise ‘Niyodo Blue’ water.
- Gem-clear pools like Niko-buchi and Nakatsu Gorge.
- Waterfalls and swimming holes in the mountains.
- Swimming and paddling in the warm months.
Combine Your Visit
- Combine with the Shimanto River for more clear water.
- Pair with Kochi Castle in the city.
- Read our Kochi overview .
Getting There
- By car: essential for the scattered gorges and pools.
- By train + car: JR to Ino, then drive up the valley.
Tips
Come on a sunny day in summer when the light brings out the famous Niyodo Blue and the water is warm enough to swim, and drive between the scattered pools and gorges as they are spread along the valley. Take great care with currents and depth when swimming in natural water, wear water shoes for slippery rocks, and go early for the calmest, clearest conditions.
