Saitama Prefecture is a landlocked prefecture of Japan located in the KantÅ region of Honshu. Saitama Prefecture has a population of 7,338,536 and has a geographic area of 3,797 km². Saitama Prefecture borders Tochigi Prefecture and Gunma Prefecture to the north, Nagano Prefecture to the west, Yamanashi Prefecture to the southwest, Tokyo to the soâŠSaitama Prefecture is a landlocked prefecture of Japan located in the KantÅ region of Honshu. Saitama Prefecture has a population of 7,338,536 and has a geographic area of 3,797 km². Saitama Prefecture borders Tochigi Prefecture and Gunma Prefecture to the north, Nagano Prefecture to the west, Yamanashi Prefecture to the southwest, Tokyo to the south, Chiba Prefecture to the southeast, and Ibaraki Prefecture to the northeast.