Ключевые слова: asia, background, blue, boil, boiling, culture, flame, float, forest, geology, green, gunma, heat, heritage, hot, hotspring, japan, japanese, kusatsu, landscape, mineral, natural, onsen, phenomenon, place, pond, pressure, relax, rock, sightseeing, smoke, soar, spa, spring, steam, stone, thermal, tradition, traditional, vapor, volcano, water, world,