Ryo Kan
Hotel SpaMexico City, Quintana Roo
A Japanese-style hotel spa in Mexico City's Cuauhtémoc district with tatami suites, outdoor onsen baths and a $2,080 day pass for couples.
$$$$
Hotel Spa
Spas inside hotels, many open to non-guests.
4 spas match
Susukino Tennen Onsen Toukakyou
Hotel SpaSapporo, Hokkaido
Natural hot spring inside Sapporo's Jasmac Plaza Hotel in Susukino, open to day visitors and hotel guests alike, with sauna and a rest lounge.
$$Ginzan-so
Hotel SpaGinzan Onsen, Yamagata
A riverside hotel spa in Ginzan Onsen with a thermal bathing pool, overnight stay and day-pass access for non-guests.
Okunoyu
Hotel SpaKurokawa Onsen, Kumamoto
Okunoyu is a ryokan onsen in Kurokawa Onsen, Kumamoto, with outdoor thermal baths open to day visitors and overnight guests, daily 8:30am–8:30pm.
