In the USA, some diners have Coke, and others have Pepsi. There's a slight difference between the two, but it is noticeable. Then there are the diners that have RC. When you find an RC diner, you've found something rare. This sento is the RC cola of sento. Everything seems the same as most other Kansai area sento, but it's just different enough. This is also one of the most "real" sento I have visited. Real in the terms that the tiles, fixtures, lockers, etc., do not seem repaired, changed, or remodeled since it was initially built. There is only a single bath here with shallow and deep sections plus a few bubbles. The shallow bubble section near the back wall is the coolest, while the deep section is scorching. I liked it, but some people might find it hard to enjoy. There is no sauna or cold-water bath here, but there is a tap water shower with a great metallic iron smell. Not sure if it is well water or just the pipes, but the shower felt great! The smells here, combined with the weather, plant-lined entrance, and evening sky outside, made me feel like this was another world. I'll happily put Mukaijima on my list of retro sento and recommend it to all those who can make the trip.