The Niyodogawa River is a first-class river flowing through Kochi Prefecture, boasting top-class water quality nationwide. Its translucent beauty, known as "Niyodogawa Blue," captivates countless visitors. While there are various theories about the river's name, a prominent one suggests that Prince Takayasu-shinno, a son of Emperor Heizei, named it "Niyodo" after the Yodo River in Yamashiro Province, as he found a resemblance during his visit to Tosa Province. The Niyodogawa River forms a breathtaking valley surrounded by abundant nature, offering activities such as canoeing, fishing, and camping. Summer is particularly bustling with people enjoying water activities and camping, while winter offers a unique charm for fishing in the crisp, clear air. Furthermore, numerous captivating sightseeing spots, including sunken bridges (shinkabashi) and gorges, are scattered along the river. The 'Nagoshiya Sunken Bridge' is the longest of the six sunken bridges on the Niyodogawa River. Its shallow waters allow you to see fish swimming in the Niyodogawa Blue. 'Niko-buchi' is a plunge pool located upstream, famously popularizing "Niyodogawa Blue" through social media and the internet. 'Agui Gorge' is known as one of the most beautiful gorges along the Niyodogawa River, filled with highlights like 'Suisho-buchi' (Crystal Pond) and a 'sand control dam'. The Niyodogawa River area also offers a variety of accommodations and restaurants, allowing for a leisurely stay. Enjoying delicious meals and onsen (hot springs) in this natural environment is highly recommended. The Niyodogawa River is a place where you can connect with nature and soothe your soul. Come and experience the beautiful scenery and rich nature of the Niyodogawa River!