Haneda Airport, Tokyo
Izumi Tenku no Yu Haneda Airport
A 24-hour airport complex with natural spring baths, a sauna and a separate stone-bathing area. The baths close for cleaning each morning, and late-night visits incur a substantial surcharge.
Check before bathing
- Opening hours
- The building is open 24 hours. Main baths and sauna: 12:30–10:00 the following day, with cleaning closure 10:00–12:30. Stone-bathing area: 12:30–09:00. From 01:00–05:00, an automatic ¥4,000 late-night surcharge applies. A 01:00–01:30 maintenance window does not allow payment or departure. Adult entry is ¥4,800 including towels and loungewear; the adult price includes a ¥150 bathing tax.
- Access
- Directly connected indoors to Terminal 3. Travellers from Terminals 1 and 2 need to transfer; the free shuttle is not an all-night nonstop service. Wheeled carry-on bags are not allowed in the spa and should be left at the second-floor counter or in a locker.
Spring & water temperature
- Spring-source temperature
- 31.5°C; sample dated 2018-10-15.
- Bathing temperature
- Fixed temperatures for the natural-spring pools are not published.
- Spring classification
- Iodine-sodium chloride strong saline spring; hypertonic, weakly alkaline and low-temperature spring.
- pH
- 7.5 in laboratory measurement and 7.6 in situ, in the 2018 sample.
- Flow rate
- 285 L/min.
- Water handling
- The natural-spring outdoor panorama bath, hot bath and indoor natural-spring bath are heated and circulated/filtered. The carbonated pool, jet baths and cold tub are not natural spring pools.
Children under 4 and guests using diapers are not admitted. Children aged 7 or older, or at least 120 cm tall, must use the bath for their own sex. Re-entry is not allowed. Current pages reviewed do not settle the tattoo policy; ask before visiting if relevant.
How to read a bath profile
Spring-source temperature and actual bathing temperature are kept separate. Each score is shown independently for comparison rather than collapsed into one overall score.
