Uraga Channel

The Uraga Channel is the zone marked in blue. Tokyo Bay, in a narrow sense, is the zone marked in pink; and Tokyo Bay, in a broad sense, is the larger zone of red plus blue together.

The Uraga Channel (浦賀水道, Uraga-suidō) is a waterway connecting Tokyo Bay to the Sagami Gulf. It is an important channel for ships headed from Tokyo, Yokohama, and Chiba to the Pacific Ocean and beyond.