>>13453305Osakans have their only dialect, which gets memed on a bit.
From what I understand the rolled Rs are a common speech trope for yakuza and other delinquent types, see:
https://youtu.be/SKE8V6QDdqk?si=4rsIF7pd0WYSxcGUThat's why you sometimes hear Iyo roll hers, and she's from Kanagawa