単たん純じゅん泉せん

noun

simple hot spring

A hot spring with a low mineral content, specifically less than 1,000 mg of dissolved minerals per kilogram of water. This is a technical classification used in Japanese onsen terminology.

• この温おん泉せんは単たん純じゅん泉せんで、肌はだに優やさしいと言いわれています。

  This hot spring is a simple hot spring and is said to be gentle on the skin.