Tokyo Bay is an important sea area that supports economic and social activities in the Tokyo metropolitan area. Within the bay is the Tokyo Bay Central Route, which is a passage- way for ships, and is an important maritime traffic hub, including large vessels such as container ships and tankers that enter and leave each port, as well as fishing boats and small boats.

Ministry of Land, Infrastructure and Transport, Kanto region- al Development Bureau Tokyo Bay Waterway Office carries out route control patrols, route control surveys and route information management for the purpose of maintaining the functions of development and maintenance routes, and is working daily to ensure the safety of routes.