Nikobuchi, a Sacred Pool Glowing with Niyodo Blue in Ino, Kochi

Nikobuchi, in Ino Town, Agawa District, Kochi Prefecture, is a mysterious waterfall basin on the Edagawa River, a tributary of the Niyodo River, one of the clearest streams in Japan. The blue shown by its crystal-clear water is called Niyodo Blue, shifting in countless ways from emerald green to deep cobalt blue depending on the angle of the sun, the season, the weather, and the water volume. Long held to be home to a great serpent that is the form of the water deity, it is also a sacred place that locals never approached. After being featured on television it became known nationwide, and today it is one of the signature scenic spots of the Niyodo River basin.

Highlights

• The mysterious Niyodo Blue surface, changing its face with light and season
• The quiet, pure scenery of a basin surrounded by deep forest
• The sacred atmosphere, said to be home to a great serpent that is the form of the water deity
• The emerald glow seen from the steps leading down to the basin

Enjoying the Seasons

From early summer into summer, when the sun climbs high, light pours onto the water and the most vivid blue can be seen. During the seasons of fresh greenery and autumn leaves the surrounding trees are beautiful too, offering a contrast with the blue water. Around midday on a clear day is recommended for savoring the beauty of the blue.

Access and Basic Information

• Location: Shimizu Kamibun, Ino Town, Agawa District, Kochi Prefecture
• By public transport, from JR Ino Station take a bus about 50 minutes, get off at Hodono-iriguchi, then walk about 20 minutes
• By car, about 60 minutes from Ino IC. Free parking for a few cars sits near the entrance
• Reaching the basin requires descending a steep slope (ropes and chains are in place; with care it takes a little over ten minutes)
• Entering the water and eating are prohibited. There is no restroom, so go beforehand

Practical Travel Notes

• Best season and time: from mid-morning to noon on a clear day when the sun is high, which shows the most vivid blue.
• Avoiding crowds: as a popular spot the parking fills on holidays, so an early arrival is reassuring.
• Time needed: about 30 to 60 minutes for the climb up and down and for viewing. It is slippery, so allow extra time.
• Nearby spots: along the Niyodo River basin, places such as Ago Gorge, Nakatsu Gorge, and the low submersible bridges let you fully enjoy the Niyodo Blue.
• Budget feel: viewing itself costs little, and parking is free.

A Quick Tip

The bluest view comes when the sun is high on a clear day. The slope down to the basin is steep, so use the ropes and chains and step carefully in comfortable walking shoes. As this is a sacred place the locals have long cherished, please do not enter the water and view it quietly.

📚 Sources

For Nikobuchi in Ino Town and the Niyodo Blue highlights, the guidance published by the Ino Town tourism association is the reliable reference. For its origin as a sacred place said to be home to a great serpent, an incarnation of a water deity, local historical materials and on-site signboards are also helpful. Checking it together with information on Yasui Gorge and Nakatsu Gorge in the Niyodo River basin makes planning easier. Parking, road conditions, and access may change, so please check official information before you set out.

Visitor Checklist

• Time needed: About 30 to 60 minutes for the stairs and viewing; it is slippery, so allow extra time.
• What to prepare: A steep path descends to the pool, so sturdy walking shoes are essential. There are no restrooms, so go beforehand. Viewing and parking are free.
• Suggested route: Descend the steep stairs from the parking area and quietly view the mysterious Niyodo Blue surface.
• Viewing manners: As a sacred place, entering the water and eating are prohibited; take your trash home.
• Best timing: Around late morning to midday on a sunny day, when the sun is high, shows the most vivid blue.