Kantō dialect
Refers to the Japanese dialects spoken in the Kantō region, including Tokyo and surrounding prefectures. Often contrasted with 関西弁 (Kansai dialect).
He is speaking in the Kantō dialect.
The intonation at the end of sentences differs between the Kantō and Kansai dialects.
Standard Japanese, largely based on the Tokyo dialect, which is a variety of Kantō dialect. 関東弁 may include more regional or colloquial features than 標準語.
Compound of 関東 (Kantō region) and 弁 (dialect). The term is straightforward and modern.