Kisarazu (Japanese: 木更津市) is a city on the west coast of Chiba Prefecture, Japan. It faces Tokyo Bay and is connected by the Tokyo Bay Aqua-Line, a bridge-tunnel, to Kawasaki and Yokohama in Kanagawa Prefecture, on the other side of the bay. Kisarazu covers 138 sq km (54 sq mi) and has a population of 130,000 people (2012 estimate).
Human habitation in the Kisarazu area can be traced to the Japanese Paleolithic period. The present city however was founded much later. It began as a village around 1871, and was given town status in 1889. It developed as a base for Japanese military activities in the 1930s. After the defeat of Japan, the base was used by the US Air Force from 1945 until 1956. Kisarazu was given city status in 1942.
The torii of Shiroyama Shrine at Mariyatsu Castle, Kisarazu, Chiba Prefecture
Two lines of the Japan East Railway serve Kisarazu. They are the Uchibo Line, which stops at the Iwane and Kisarazu stations and the Kururi Line, which stops at the Kisarazu, Chiba, Kazusa-Kiyokawa, Higashi-Kiyokawa and Makuta stations. A number of highways serve Kisarazu including the Tateyama Expressway, the Tokyo Bay Aqua-Line, the Ken-O Expressway and Japan National Routes 16, 127, 409 and 410.