Ajigawaguchi, Konohana Ward, Osaka
Natural Hot Spring Hinata-no-Yu Osaka Universal Bayside
A practical stop for USJ and Universal City visitors who want a bath, sauna and 14th-floor views before heading back to their hotel. It is a long detour if your plans are around Shin-Osaka or Umeda instead.
Check before bathing
- Opening hours
- 07:00–24:00; last admission 23:00. Adult admission is ¥900 on weekdays before 17:00, ¥1,100 after 17:00, and ¥1,200/¥1,400 on weekends and public holidays for the same time bands. Children aged 4 through elementary school are ¥500/¥600; children aged 3 and under are free.
- Tattoo policy
- Tattoos are generally prohibited, but a May 20, 2026 notice allows entry when every visible tattoo is completely covered with the facility's designated cover stickers.
Spring & water temperature
- Spring-source temperature
- Not published.
- Bathing temperature
- Indoor baths are listed at 40–41°C, the changing bath at 38–42°C, outdoor and pot baths at 40–42°C, and the artificial carbonated bath at 39–40°C.
- Spring source
- Natural spring water drawn from about 1,000 m underground; no formal source name is published.
- Spring classification
- Natural hot spring; the current main official pages do not publish a statutory classification or full ion analysis.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The facility has six bath types for each gender and separately labels its artificial carbonated bath. The natural-spring pools and their water treatment are not fully identified pool by pool; no uniform supply method is inferred.
Children still in diapers may not use the baths. Mixed bathing is limited by the facility's age rule. There is no nap space, so this is not an overnight-stay option.
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.
