WEBShizuoka Prefecture. / 34.917°N 138.317°E / 34.917; 138.317. Shizuoka Prefecture (静岡県, Shizuoka-ken) is a prefecture of Japan located in the Chūbu region of Honshu. [2] As of September 2023, Shizuoka Prefecture has a population of 3,555,818 and has a geographic area of 7,777.42 km 2 (3,002.88 sq mi). Shizuoka Prefecture borders ...