Gujo Hachiman is one of the most beautiful cities in the world. A city located in Gifu Prefecture which is famous for its clean and charming water system. The city was founded in the 16th century after the construction of Hachiman Castle. The people of Gujo practice the same water system since the 17th century. Even though they use water to wash rice, vegetables and clothes, residents are obliged to follow the prescribed procedures to keep the water clean and pure.
Residents are very aware of how important water is to them, so they are committed to keeping it clean until now. That's why the drinking water that flows in Gujo is a source of pride for its residents. Because of its cleanliness and freshness, people are even used to washing rice and vegetables directly. The water that flows in this city comes from three rivers, namely the Yoshida, Nagada and Kodara rivers. This is Gujo Hachiman, with the cleanest sewers in the world with potable water.