相模川
Hiratsuka is located in the Shōnan area on the right bank (west side) of the Sagami River, almost in the center of Kanagawa Prefecture, and faces Sagami Bay to the south. The area from the Sagami River to the Kaname River is a plain to the northern end of the city area, and the urban area extends to the south. The west side of the Kaname River is a hilly area that is part of the Oiso Hills, and there is a lot of greenery. It is approximately midway between Tokyo and Mount Fuji.