Shitamachi dialect; working-class Tokyo dialect
Refers to the traditional dialect spoken in the Shitamachi (downtown) area of Tokyo, associated with working-class and merchant communities. Often contrasted with 山の手言葉 (Yamanote dialect).
A feature of the Shitamachi dialect is pronouncing 'hi' as 'shi'.
He is a true Edokko and speaks the Shitamachi dialect.