KODAMA ( (echo in English) aims at demonstrating the existence of voice as a physical object and how it floats through space.

KODAMA are tree fairies that hide in the forest and listen quietly to your voice. They collect the voices and trap them in a bubble of air. When KODAMA don’t sense the presence of humans they start playing with the voices that have been left in the forest.
But as soon as they do notice someone they hide themselves with the “voice” and wait to collect new “voices”.
By Hisako Kroiden Yamakawa. Other work by the artist: Kotodama.