Yokosuka Middle School was opened in 1999 as a 6–8 grade school with the separation of middle school grades from Nile C. Kinnick High School.
The school is located on Yokosuka Navy Base, a 1-hour train ride south from Tokyo and a half hour train ride from Yokohama. It is located on the coast at the mouth of Tokyo Bay. Just outside the base is Yokosuka city which has a population of about 400,000. The school is within walking distance of The Sullivans Elementary School and Nile C. Kinnick High School. The school has 630-670 students, who come from an area covering Yokohama, Ikego, Yokosuka city and the surrounding Kanagawa area. The school mascot is the Dragon.