Kenichi: The Mightiest Disciple - Season 1 Episode 6 A Day at Ryozanpaku! The Rooftop Dream! From Wimp To Warrior. Sort of.
Overview: Kenichi decides to spend the entire weekend at the Ryouzanpaku dojo and train for his imminent fights. His little sister then goes to check out this dojo, to see what kind of torturous things he's going through.