about 400 years ago, maintenance dug artificial moat to form a castle town in the cage of Yanagawa Castle fortification have been made. There is in place a water supply system for flood control, irrigation, various mechanisms by the wisdom of our ancestors has still alive. Yanagawa the feudal era of heritage alive is the city of the world's leading waterway in harmony with canal that extends to the center city 2km square to the extension 60km. Leave it to the road of water of the moat, please enjoy a boat trip with the Funauta ( boatman song ) of boatman.