A group of dialects in the Kansai region of Japan.
Much like any language, Japanese has its own variety of dialects that differ between regions. If a character hails from Osaka or the surrounding area, chances are they will be speaking in Kansai-ben, or the Kansai dialect.
To the Japanese people, Kansai-ben is a more rural, folksy version of the normal language. In some English-dubbed shows, like Burst Angel, the voice actors try to replicate it with heavily-accented (American) southern accents.