Iwata is a city located in Shizuoka Prefecture, Japan. As of 1 May 2019, the city had an estimated population of 169,897 in 68,215 households and a population density was 1,000 persons per km2. The total area of the city was 163.45 square kilometres (63.11 sq mi). Iwata is widely known as the headquarters of the Yamaha Motor Corporation. Iwata is also home to Júbilo Iwata, a J. League soccer team, as well as Yamaha Jubilo, a rugby team.

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.