Makinohara is a city located in western Shizuoka Prefecture, Japan. As of 31 July 2019, the city had an estimated population of 45,813 in 16980 households and a population density of 410 persons per km². The total area of the city was 111.69 square kilometres (43.12 sq mi).

Shizuoka Prefecture is a prefecture of Japan located in the Chūbu region of Honshu. As of September 2023, Shizuoka Prefecture has a population of 3,555,818 and has a geographic area of 7,777.42 km2 (3,002.88 sq mi). Shizuoka Prefecture borders Kanagawa Prefecture to the east, Yamanashi Prefecture to the northeast, Nagano Prefecture to the north, and Aichi Prefecture to the west.