Our fun and energetic guide Hatchan gave us a wonderful tour of the bustling Dotonburi area and pointed out many things that the foreign tourist would never notice. Ask her what Ai Seki dining is! I'm sure we could have spent longer, but 45 minutes of walking was perfect for us.
PS - the meeting place is in the back of a gift shop. From the street, look for the Taro mannequin of a young man with eye glasses in a red/white stripe clown suit playing a drum.