If you'd like to add a little more culture to your getaway, put Dotombori Konamon Museum on your itinerary. Check if there are any guided tours or just wander around at your own speed.
This museum is located in Minami. Once you've done all you can at Dotonbori Konamon Museum, have a look at nearby Osaka Castle, Osaka Aquarium Kaiyukan, and Osaka Science Museum.