In the mid 1960’s, there was a collective of contemporary musicians in Osaka, called Art Zyklus. Because Hajime Yamashita, one of the core members, had sold a part of his privately stored sound source over the Internet, the whole picture of amazing and completely unknown activities was revealed. The release compiled works created by Art Zyklus as well as Yamashita. Worth mentioning is that ‘Music for Electric Metronomes’ by Toshi Ichiyanagi was premiered in Japan. Apart from that, the fact that Yamashita founded his own electronic music studio was unprecedented at the time. Also, it was revolutionary that he generously showed his knowledge of electronic music by playing on an electronic device such as a self-built theremin, when performing a concert.