Ключевые слова: acid, acidic, acidity, air, ancient, area, asia, asian, bath, current, flowing, gunma, health, hot, house, japan, japanese, kusatsu, landmark, natural, onsen, open, outside, public, relax, resort, rural, sightseeing, source, spa, spring, steam, stream, sulfur, sulphur, tourist, tradition, travel, trip, vapor, water, wood,