Only been to Osaka twice and never got around to seeing the city. But when I go, there are two places that I liked which I will go back to. The first is Fugetsu which is a Danny's-like fast food chain serving okonomiyaki, Japanese pizza which originated in Osaka. Not fanciful food but goes down well with a beer. Also quite an experience to see it done before you as every seat has a grill in front of it. The other place I like is a kshinobo place meaning assorted fried things on a stick. This place is right behind the Ritz Carlton hotel. If you ask the concierge there, I am sure they will refer you to it. It is about a 5 minutes walk from the hotel.