Amami Onsen Nanten-en

Spring-source temperature

Not published on the current main official text pages

Bathing temperature

Fixed bath temperature not published

Spring source

Natural radium spring on the Nanten-en grounds at Amami Onsen

Spring classification

Natural radium spring (simple, mildly radioactive spring; hypotonic, neutral, cold spring)

pH

Not published

Flow rate

Not published

Water handling

The private cypress open-air bath at Seiryu-tei uses naturally emerging spring water on a free-flow basis, as stated by the operator; this applies only to that guest-room bath. The Gokuraku-yu public baths are recirculated and filtered. The operator has not published full details on water addition, heating or disinfection for each public bath.

Analysis date

Not published

The spring source temperature, fixed bath temperature, pH and yield are not published on the current main official text pages; do not infer a temperature from the term “cold spring.” The public baths are recirculated and filtered. Only the private Seiryu-tei open-air bath is confirmed as free-flowing. Day visitors cannot bathe without a meal plan. The registered historic wooden building has no elevator and includes steps. The operator's FAQ confirms that tattoos are allowed in the public bath.