With a total length of 138 kilometers and a watershed area of 1,240 square kilometers, the Tamagawa River is full of wild flowers and wild birds.The scenery of nature is abundant in the four seasons, and it is a place of relaxation for citizens.
In The Free Hiroba, a monument of the Tama River collapse (Inogata 4-chome) is erected to convey the memory of the Tamagawa River flood disaster in 1974.