Hakata Port, Fukuoka City, Fukuoka Prefecture
Minato Onsen Namiha-no-Yu
A convenient harbor-side stop for a natural spring, with private baths available as a separate option. The source-fed cooler pool is distinct from the circulating baths, and tattoos are not accepted.
Check before bathing
- Opening hours
- Bathing 10:00–23:00; last admission 22:15. Open year-round except for equipment inspections. Admission is ¥1,100 on weekdays and ¥1,250 on weekends and public holidays. Private baths start at ¥3,900 for 90 minutes.
- Tattoo policy
- People with tattoos, tattoo stickers or body paint are not admitted, including to private baths.
Spring & water temperature
- Spring-source temperature
- Not published on the current official main page.
- Bathing temperature
- Source-fed cooler pool about 30–38°C; pot baths about 38–40°C; the warm pool is usually about 41°C, but was listed at about 38°C for 2026-04-20 to 2026-10-31; the hot pool about 43°C.
- Spring source
- Hakata Bayside Onsen, drawn from about 800 m underground.
- Spring classification
- Calcium-sodium chloride spring.
- pH
- Not published on the current official main page.
- Flow rate
- About 400 L/min.
- Water handling
- The cooler source-fed pool is heated and cannot be temperature-adjusted by guests. The warm, hot and pot baths use circulation. The operator does not support describing the entire facility as unheated or undiluted source flow.
Bathing indications
The operator lists cuts, burns, chronic skin conditions and chronic gynecological conditions among bathing indications; this is not a promise of individual results.
Admission does not include towels. Groups of ten or more are not accepted for bathing or the stone spa.
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.
