単たん純じゅん温おん泉せんたんじゅんおんせんMeanings1nounsimple hot springTechnical term for a hot spring with less than 1,000 ppm of dissolved minerals. Also called 単純泉.See also: 単純泉この地ち域いきの温おん泉せんは単たん純じゅん温おん泉せんで、
