灰野敬二
He was a visiting artist at Wesleyan University, sponsored by Clifford Thornton. He also briefly formed a non-jazz group called Purple Trap with Japanese experimental guitarist Keiji Haino and jazz-fusion bassist Bill Laswell. Their album, "Decided...Already the Motionless Heart of Tranquility, Tangling the Prayer Called "I"", was released by Tzadik Records in March 1999.