Tokyo Bay Reformation

Tokyo Bay is a long, oval-shaped body of water surrounded by Tokyo, Chiba Prefecture, and Kanagawa Prefecture (Fig. 1). It is connected to the Pacific Ocean by Uraga Channel (90 m deep, 7 km wide). Tokyo Bay, from its mouth to its most distant point, has a length of approximately 90 km; it has a width of about 20 km. The bay encompasses a water area of about 1,200 km2. It is relatively shallow, 18 m on the average. The total length of the coastline inside the bay is approximately 180 km. Tokyo Bay has 31 ports, of which Yokohama, Yokosuka, Kawasaki, Tokyo, Chiba, and Kisarazu are the largest. As a result, many ships navigate the bay and the traffic is always heavy.