I saw this band playing a small venue in Hatsudai last year. We got "Purple Haze", "Eleanor Rigby", "Immigrant Song" and "Godzilla" on shakuhachi and koto.
Kokoo web site
Snippet of King Crimson's "Moonchild" for koto and shakuhachi
You'll be surprised when you hear the techniques of the old masters married with contemporary sound innovations - slapping/rapping different parts of the koto's body, the shakuhachi's multiple tone (five tones audible simultaneously), simultaneous blowing of shakuhachi and vocalizing, foot-stomping and hand-clapping, etc. While listening, it's difficult to imagine that only three musicians are responsible for all this sound!
Kokoo CD Review on AMG
Disconcerting music at first, but afterward their talents and imaginations grow on listeners. A discovery.