Shizuoka Prefecture - Wikipedia Shizuoka Prefecture (静岡県, Shizuoka-ken; Japanese pronunciation: [ɕi (d)zɯꜜ o ka, ɕi (d)zɯ o kaꜜ keɴ] [2]) is a prefecture of Japan located in the Chūbu region of Honshu [3] 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 Kanagawa Prefecture to the east, Yamanashi