The Kawauchi River, which flows through the center of Kawauchi-cho, Mutsu City, is the most abundant river in the Shimokita Peninsula, and you can enjoy a variety of valley beauty such as water, water, and waterfalls. Along the mountain stream, a promenade continues along the mountain stream for a total length of 4.4km, and is dotted with highlights such as Takimodai, Yatsubashi, and Shimotokagafuchi. There are three bridges along the way, including the Hydrangea Bridge, which is a suspension bridge, and the Sekiray Bridge, where you can see the Otaki from the front, and there are also hiba-built rest areas.