The Japanese Maritime Safety Agency has established a Tokyo Bay Traffic Advisory Service Center at Kannon Saki at the entrance to the bay in order to promote the safe navigation of vessels. The Center is equipped with radar linked to a computer. The information and control service has been operational from 25 February 1977.

Information will be broadcast to all vessels concerning the traffic schedules of very large vessels, the movement of fishing craft and of other vessels on the traffic route or in neighbouring waters. Transmissions are also made by v.h.f. individually to any vessel requesting information as to her position or the movements of other vessels.