Gamo, Joto Ward, Osaka
Utopia Shiratama Onsen
An early-opening neighborhood sento with a deep cold bath, frequent auto-loyly and a notably long day. Despite its name, it is not a confirmed natural hot spring.
Check before bathing
- Opening hours
- 06:00–01:00 the next day, year-round. Adults ¥600; junior-high students ¥400 with proof; elementary-school children ¥200; preschool children and younger ¥100. Sauna is an additional ¥300 for a two-hour wristband period. From April 1, 2026, towels cost ¥100, bath towels ¥200, or ¥300 for the set.
- Access
- About a 10-minute walk from JR Kyobashi Station or Osaka Metro Gamo-yonchome Station.
- Tattoo policy
- Tattoos are allowed; the operator's FAQ explicitly confirms this.
Spring & water temperature
- Spring-source temperature
- Not applicable; no natural source has been confirmed.
- Bathing temperature
- The cold bath is about 15°C; fixed temperatures for other baths are not published.
- Spring classification
- Ordinary public bath; a natural spring source has not been confirmed.
- Water handling
- The facility's approximately 1,000 ppm carbonated bath is a functional carbonated bath, not evidence of a natural carbon-dioxide spring. Source name, statutory spring analysis, source temperature, pH, yield and source-flow conditions are not published.
The weekly parent-child Saturday program ended in March 2026. Children from elementary-school age may not bathe with an adult of the opposite sex.
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.
