Supersento in an entertainment complex. Great water. Lots of different baths including a very shallow onsen filled bath that I really enjoyed. The spring water is very noticeable and worth trying. There is also a great carbonated bath. Good place, but heavily used and shows the wear and tear that comes with it's popularity. The rotenburo is pretty big for being on top of a building but has a great wide open feel that makes you forget you are only a few minutes away from downtown Osaka.

Update 2019: The bowling alley along with the 100 yen store and restaurants in the same complex are good fun for a family night out.