Nakatsu Gorge (Niyodo River)

Nakatsu Gorge is located in Kochi Prefecture on Shikoku Island, Japan, and serves as one of the premier locations to experience the famous "Niyodo Blue" phenomenon. The gorge was formed over 300 million years ago through tectonic activity, creating a dramatic landscape along the Nakatsu River, which is a tributary of the renowned Niyodo River. The Niyodo River itself holds historical significance, being mentioned in the tenth-century Engishiki, an early compilation of Japanese laws and customs, as the source of special sweetfish offered as tribute to the Imperial Palace in Kyoto.

The gorge is considered sacred by locals and regarded as a spiritual "power spot" within Shinto tradition. Stone statues representing the Shichifukujin (Seven Gods of Fortune) are positioned throughout the gorge, and the Buddhist deity Fudo Myoo also appears among the stone scenery. The site forms part of the Niyodo Blue prefectural nature park, named for the distinctive crystalline azure color of the water that results from exceptional clarity and purity.

The main visitor experience centers on a 2.3-kilometer riverside path that follows the Nakatsu River, crossing via steppingstones and small bridges while weaving through massive moss-covered boulders. The trail culminates at Uryu no Taki waterfall, where water plunges 20 meters into vivid blue pools below. A traditional hanging rope marks the waterfall, symbolizing the division between the human world and spirit world according to Shinto belief. A complete round trip typically takes approximately one and a half hours.

The gorge entrance is a seven-minute walk from the bus stop. Limited parking is available directly at the entrance (three spaces), while the former Nanokawa Elementary School playground, located 100 meters before the gorge, offers approximately 30 parking spaces. Entry to the gorge is free of charge. Visitors should wear sturdy walking shoes as the paths include uneven surfaces, boulders, and steps that can become slippery when wet.

From Kochi City, the gorge is accessible by car in approximately one hour and 20 minutes, or about one hour and 40 minutes from Matsuyama. By public transport, visitors take the JR train from Kochi Station to Sakawa Station, then board the Kuroiwa sightseeing bus toward Kawado, getting off at Nanokawa bus stop after around 35 minutes.