単純温泉 たんじゅんおんせん Meanings Noun simple hot spring (containing less than one thousand ppm of dissolved minerals) See also: 単純泉 (たんじゅんせん). Kanji 単 single. Read as タン. 純 pure. Read as ジュン. 温 warm. Read as オン. 泉 wellspring. Read as セン. Jinuma: Japanese Dictionary · Word lists