Uchida Sound Labo’s ambient music.

Kuu, 空 in Japanese character, means sky; it also reminds us of  air, space, and emptiness in Buddhism.
This music is monotonous, but the sound image changes slowly and constantly. It is a sound that balances the mind and body, like the soothing natural sounds of the wind, flowing water, and birds chirping.
The sound is designed with the image that acts on the unconscious area to remove unnecessary stress of the mind and body just by listening.