Billion Onsen and Spa
Day SpaKuala Lumpur
An onsen-style day spa in Kampung Baru, Kuala Lumpur, with thermal pools, sauna, steam room and couples treatments.
Japanese hot-spring baths, often with ryokan stays.
14 spas match
Kuala Lumpur
An onsen-style day spa in Kampung Baru, Kuala Lumpur, with thermal pools, sauna, steam room and couples treatments.
Da Nang
A Korean-style bathhouse and onsen complex in Da Nang's Hoa Xuan area, with hot spring baths, 11 sauna rooms, massage and a riverside restaurant.
Beppu, Oita
A hot-spring bathhouse in Beppu's Kannawa district, running since 1922 on 100% unblended spring water with walk-in day passes.
Mexico 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.
Sapporo, 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.
Arima Onsen, Hyogo
A moderately priced onsen bathhouse in Arima Onsen, Kobe, with a forest sauna, a large outdoor bath, yoga and an award-recognized restaurant.
Ginzan Onsen, Yamagata
A riverside hotel spa in Ginzan Onsen with a thermal bathing pool, overnight stay and day-pass access for non-guests.
Kurokawa 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.
Kurokawa Onsen, Kumamoto
A nine-room ryokan in Kurokawa Onsen where every detached suite has its own source-fed open-air bath, open to overnight guests only.
Shibu Onsen, Nagano
A ryokan in Shibu Onsen with indoor and outdoor hot-spring baths fed by two blended mineral springs, open only to overnight guests.
Ibusuki, Kagoshima
A ryokan-style hotel in Ibusuki with source hot-spring baths, both shared and private, open only to overnight guests.
Arima Onsen, Hyogo
Hotel spa in Arima Onsen with Arima's rare iron-rich "ginsen" waters, outdoor baths, sauna and jacuzzi, run as an all-inclusive overnight stay.
Atami, Shizuoka
A hotel spa in Atami with a thermal onsen pool, open only to overnight guests staying at Fufu Atami.
Yufuin, Oita
A small hillside ryokan near Yufuin's town center where every room has its own half-open-air bath filled with 100% source hot-spring water and a view of Mt.