Shibayama, Chiba Prefecture
Narita Airport Onsen Soranoyu
An airport-side hot-spring facility with a natural source-flowing outdoor pool and separate baths whose water is diluted and circulated. Tattoos are generally restricted in the public bathing area, with a limited coverable-tattoo exception.
Check before bathing
- Opening hours
- 10:00–23:45. Adult admission for up to three hours is ¥1,000 on weekdays or ¥1,300 on holidays; the stone-sauna package is ¥1,500 or ¥1,800 respectively. Towel set ¥300. Check for annual maintenance closures and special-date pricing.
- Access
- The shuttle serves Terminals 2 and 3, not Terminal 1. From September 1, 2026, the boarding point shifted about 10 metres outside the main entrance to a bus shelter. Large-luggage storage is available; it is not a standard locker setup.
- Tattoo policy
- Tattoos are generally not accepted on the main public-bathing floor. Small tattoos that can be fully covered with a palm-sized cover are accepted. Private rooms on the second floor can be reserved; ask the facility about their conditions.
Spring & water temperature
- Spring-source temperature
- 29.3°C; sample dated 2018-08-23.
- Bathing temperature
- Not published.
- Spring classification
- Iodine-sodium chloride strong saline spring; hypertonic, neutral and low-temperature spring.
- pH
- 7.44 in laboratory measurement and 7.4 in situ, in the 2018 sample.
- Flow rate
- 266 L/min by mechanical pumping.
- Water handling
- The outdoor flow-through bath uses natural source water. The outdoor relaxation bath uses the same spring but is diluted, heated, chlorinated and circulated/filtered. The indoor carbonated bath, artificial-spring bath and cold well-water pool are not natural spring pools.
The source analysis is dated 2018. Tattoo access is limited by size and coverability; confirm the latest rule before visiting.
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.
