I think I prefer the
flesh-eating fish spa to
this one in Japan, where the bath is intended to recreate a ramen noodle meal. The water is flavored with pepper, and colored a light brown to resemble pork broth. The noodles are some sort of salt additive when they eventually get dunked.
It turns out to be at a weird bathing theme park called Hakone Kowakien Yunessun, where they also offer tea baths:
and coffee:
and red wine:
Only one more weird asian bathing spa IotD to complete the weird asian bathing spa trifecta.