Day spa experience was top notch tbh. The place was nice and quiet and the massage was freaking phenomenal (no hinkey shit either). I even braved the cold plunge. There's an individual bathing room which was actually so fun, though I did feel like human soup - at least the water is constantly running so I didn't need to worry about being in Other People Soup. Free snacks and drinks and even tea eggs in the cafeteria!
Would recommend Ariyma! (but also don't go because I liked how quiet it was)
Followed by dinner at Ishiya, it's been a hell of a decadent day.