It´s a Japanese dance that originated after WWII to help people deal with their frustration. I witnessed a performance yesterday and it was absolutely fantastic, as in full of fantasy. You´ve never seen something remotely similar... Their prefromance took place in a Catholic church, BTW (?) and they danced to the sound of live harmonic chants and quarz bowls. Weirdest feeling ever, like everything around you suddently became unreal!

Here are some pics of butoh dancers for you to get the picture:

http://www.paszkowska.de/butoh-dance-photographs_english.html