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Nikobuchi

— The Niyodo Blue pool on the Edagawa River

natureThe classic — done right

A rock basin on the Edagawa River in the mountains west of Kochi, fed by water that drains to the Niyodo. The colour runs from emerald to deep cobalt with the light, and the pool is treated as sacred ground rather than a swimming hole.

FromIno Station
~70 minBus, then 20 min on foot
Get off atHodono-iriguchi (Tosaden Kotsu bus)
From there
Nikobuchi

Directions ↗

Where it is

18 more notes in Kochi · open the map →

What to look for — in walking order

Niko-buchi on the Edagawa RiverRaita Futo from Tokyo, Japan / CC BY 2.0

The entrancecar parking, a public toilet and multilingual signboards at the top of the path
The walkway downa gentle ramp for the upper half and shallow steps for the lower, replacing the old descent
Nikobuchi poolthe rock basin itself, its colour running from emerald to deep cobalt with the light
The Edagawa Riverthe tributary that feeds the basin and carries the same water down to the Niyodo

How to actually get there

JR Ino Station → Hodono-iriguchi (Tosaden Kotsu bus toward Nagasawa or Doi, about 50 min).
Walk up the valley toward Green Park Hodono, about 20 minutes.
Take the walkway down from the signposted entrance to the pool.
Climb back to the road and return on the departure you noted on arrival.

Tosaden Kotsu bus from Ino Station: From JR Ino Station take the Tosaden Kotsu bus signed for Nagasawa or Doi and ride about fifty minutes up the valley to Hodono-iriguchi. From the stop it is roughly twenty minutes on foot in the direction of Green Park Hodono. Services are few, so read both directions of the timetable before boarding.
Back down the valley to Ino: The same route returns to Ino Station, but departures are widely spaced and the stop has nothing at it, so note the return time when you get off. This gap is exactly why most visitors arrive by car.

Directions from my location (Google Maps) ↗

About the place

The Edagawa River falls through a wooded gorge in Ino and pools in a rock basin before it carries on down to the Niyodo. The Niyodo has repeatedly been ranked the cleanest of Japan's first-class rivers in national surveys, and at this basin that clarity does something particular: the water reads as colour rather than as transparency, shifting between emerald and deep cobalt according to how much sun reaches the gorge, the angle of the season, the weather and the volume coming down. Local people have held the pool sacred for as long as anyone records, as the home of a great serpent — the water deity in another form. That belief is still the working rule here. The pool is looked at, not entered.

How to enjoy it

The colour depends on sunlight reaching the floor of the gorge, so a bright day with the sun well up does more for this place than an early start. Allow more time than the distance suggests, because the return is a climb. Read the notices at the top before you go down: no entering the water, no eating, nothing left behind — the toilet at the entrance exists so that the rule can hold below.

Background & history

Nikobuchi has no monument and no founding date. What it has is a prohibition handed down locally: the basin belongs to the water deity, and it is not a place to bathe, to eat or to leave anything behind. When photographs began drawing visitors up the valley, that rule was written down rather than dropped, and the town and the river's own tourism body now publish it in almost the same words. The infrastructure has followed the same logic — a rebuilt walkway replaced the steep flight of steps that used to be the only way down, and a toilet was put at the entrance precisely because there is not to be one below.

Before you go

Cash: There is no admission and no ticket office, and parking at the site is free. Carry cash for the bus and for anything you want on the way up, because there is nothing to buy at the pool.
Good to know: The rock around the basin is very slippery, and rain or high water turns the gorge from wet to dangerous. Wear shoes that grip, and treat a wet or swollen-river day as a day to skip it.
Another way: By car it is roughly seventy minutes from central Kochi. Navigation systems are aimed at Green Park Hodono rather than at the pool, and several car parks are spread around the entrance.
After you get off: From Hodono-iriguchi the road runs on up the valley toward Green Park Hodono. The entrance to the pool is signposted off that road, with the parking, the toilet and the boards at the head of the path down.