Guide
Angoi Keikoku (Angoi Valley) is a stunning natural landmark located in Niyodo Town, Agawa District, Kochi Prefecture. It is widely recognized as one of the premier spots to witness the legendary 'Niyodo Blue,' characterized by its incredibly clear waters that shift from a brilliant emerald green to a deep, translucent blue. The landscape is defined by a dynamic topography of limestone cliffs and jagged rock formations, surrounded by lush, dense forests. This area offers a different, breathtaking face with every season, making it a masterpiece of natural sculpture.
The area has long been cherished and preserved for its pristine natural beauty. Located upstream of the Angoi River, the environment has been maintained in its natural state for generations. The local culture is deeply rooted in living in harmony with nature, and the breathtaking scenery is a source of great pride for the local community. The crystal-clear waters serve as a symbol of the region's commitment to environmental conservation and the preservation of its natural heritage.
There are numerous spectacular sights within Angoi Keikoku. The most iconic is the 'Hiryū no Taki' (Dragon's Flying Waterfall), a powerful two-tiered waterfall with a 30-meter drop. Its name, which evokes the image of a dragon soaring upward, reflects the strength of the cascading water. Other notable spots include 'Suisho-fuchi' (Crystal Pool), where the water color shifts between blue and green depending on the light, and 'Mikari no Taki' (Looking-back Waterfall), which can be viewed from the roadside. The clarity of the water is so exceptional that the rocks and pebbles on the bottom are clearly visible, creating a mesmerizing underwater view.
The ideal time to visit depends on what you wish to see. From spring to summer, the emerald green waters and vibrant greenery create a refreshing and cool atmosphere. In autumn, the surrounding forest transforms into a tapestry of red, orange, and yellow, creating a stunning contrast against the blue water. For the best experience, visit during the daytime when sunlight filters through the trees, illuminating the water's surface and the mist from the waterfalls to highlight the incredible transparency and color.
Visitors primarily enjoy exploring the valley through scenic walks. Well-maintained paths and observation points allow you to get a close-up view of the cliffs and the rushing stream. The area is also known for activities like Amego (mountain trout) fishing. For those looking for a base of operations, 'Horaiso'—a facility that combines dining and lodging—is located within the area. Immersing yourself in the silence of the valley, listening to the sound of water and feeling the mountain air, offers a profound sense of tranquility away from daily life.
The area around Angoi Keikoku is dotted with spots to enjoy the great outdoors, including various campsites and bungalow facilities for an immersive nature stay. It is also easily accessible from other sightseeing spots in the Niyodo River area of Kochi, making it an excellent destination for road trips or motorcycle touring. Many viewpoints along the local roads offer great opportunities to stop and admire the scenery.
To preserve this delicate environment, please follow these guidelines. Because the terrain includes rocky paths and unpaved sections, we recommend wearing sturdy walking shoes and comfortable clothing. Please note that cash is required for most local services and facilities. To protect the environment, please take all your trash home with you. If you are camping or participating in river activities, ensure you follow local rules regarding fire safety (open flames are generally prohibited).