Saitama Prefecture is bordered by Tokyo, Chiba, Ibaraki, Tochigi, Gunma, Nagano, and Yamanashi.
April 12005: The town of Yoshida and the villages of Arakawa and Otaki (all from Chichibu District) and the old city of Chichibu merged to form the new city of Chichibu.
October 12005: The the town of Fukiage from Kitaadachi District and the town of Kawasato from KitasaitamaDistrict merged into the city of Konosu.