It is located in Kanagawa Prefecture, and consists of the cities of Miura and Yokosuka.

This constituency has United States Fleet Activities Yokosuka where is the home port of US Naval Forces in Japan which is the integral part of United States Forces Japan, home of Seventh Fleet of United States Navy and JMSDF Yokosuka Naval Base, which hosts Fleet Submarine Force, Mine Warfare Force, Fleet Research and Development Command, Fleet Intelligence Command of Japan Maritime Self-Defense Force.

It also has Nissan Oppama Plant, Yokosuka Research Park Former Prime Minister of Japan Junichiro Koizumi served as the first representative of the constituency from its creation in 1996.

Koizumi retired at the 2009 elections[1] and his son Shinjirō ran as a candidate for his father's old seat.

[2] The Democratic Party of Japan fielded Katsuhito Yokokume, a lawyer and former participant in the Ainori TV show,[3] as a candidate in 2009 to a bid to end the LDP dominance of the district.