If there was a sento at Tokyo Disneyland, it would look like Yuya no Sato. A giant waterfall with a cavern like bath behind it, jet baths powerful enough to push you across the bath, and a monkey bar above that very bath. The spring filled outdoor bath, carbonated bath, cavern like mist sauna are great for sento enthusiasts. Let’s not forget to mention the "Spirited Away" looking exterior. It's almost a simulacrum of a sento. Overall it's an enchanting, wonderful place. It reminds me much of the Dogo Onsen in Matsuyama that was the inspiration for the one in "Spirited Away.” One note, the locker numbers are written in kanji so if you can't read numbers in kanji you might have a problem.

Update 2018: The entire place looked like it was in need of a good repair. That said it was still clean and enjoyable. I forgot how good the spring here is.