West Kantō(西関東, Nishi-Kantō): Gunma, Saitama, Tokyo, Kanagawa(and sometimes Yamanashi) Prefectures.
The park spreads over four prefectures: Tochigi, Gunma, Fukushima, and Niigata, and was established in 1934.
The most often used subdivision of the region is dividing it to"North Kantō"(北関東, Kita-Kantō), consisting of Ibaraki,
Tochigi, and Gunma Prefectures, and"South Kantō"(南関東,
Minami-Kantō), consisting of Saitama(sometimes classified North), Chiba, the Tokyo Metropolis(sometimes singulated), and Kanagawa Prefectures.