Yokosuka was to become one of the main arsenals of the Imperial Japanese Navy into the 20th century, in which were built battleships such as Yamashiro, and aircraft carriers such as Hiryu and Shokaku.
Yokosuka now is home to one of the biggest military seaports shared by the United States Navy and the Maritime Self-Defense Force of Japan.
Yokosuka Port commanding the mouth of Tokyo Bay is headquartered by the U.S. 7th Fleet.
YokosukaCity commanding a strategic location at the mouth of Tokyo Bay developed as a naval port during the age of militarism.
Kanagawa is a relatively small prefecture wedged between Tokyo on the north, the foothills of Mount Fuji on the northwest, and the Pacific Ocean and Tokyo Bay on the south and east.