Hot spring in the broad sense (hot springs defined by the law: In order to be defined as hot springs, according to the Japanese Hot Spring Law, water in question is not necessarily required to be hot so long as it is natural and special water that is different from normal water (mineral water) or it gushes out together with volcanic gas (refer to the definition of hot springs).
広義の温泉（法的に定義される温泉）：日本の温泉法の定義では、必ずしも水の温度が高くなくても、普通の水とは異なる天然の特殊な水（鉱水）や火山ガスが湧出する場合に温泉とされる（温泉の定義参照）。