In recent years, as people have become more and more health conscious, they have taken a greater interest in bathroom amenities. As a result, whirllpool baths have become increasingly popular, because consumers believe that whirlpool baths are effective for relieving fatigue. This report introduces TOTO's applied technique, which controls the jet stream mixed air (gas-liquid two-phase flow) according to somatic sensations, and in addition, submits subjects for further research.