Kirk here. Any of you been looking at the “Kumamoto Scoop” website? I just learned about it, ironically from a Japanese-language article reporting on this site with information for foreigners. Here’s the article that’s listed as its most popular. I’m particularly pleased to find this article because the spa is quite near where I live. :)

Suizen Luxury Sauna https://en.akumamoto.jp/archives/220746

Japanese news article where I learned about this website https://prtimes.jp/main/html/rd/p/000000004.000109953.html