noun
Kantō region
Modern geographic region comprising Tokyo and the surrounding prefectures (usually Ibaraki, Tochigi, Gunma, Saitama, Chiba, Tokyo, Kanagawa).
関東地方は日本の首都圏を含む。
The Kantō region includes Japan's metropolitan area.
noun
Kantō (historical)
Historical term for the eastern half of Japan during the feudal era, roughly east of the Hakone checkpoint.
江戸時代以前、関東は東国の武士の拠点だった。
Before the Edo period, Kantō was a base for warriors of the eastern provinces.