He is the co-founder of Death Ambient with Ikue Mori & Fred Frith. His other groups as a leader are: Green Zone with Otomo Yoshihide & Uemura Masahiro and OMNI wtih Nakamura Toshimaru & Akiyama Tetsuji. His compositions include: solo piece "Turbulent Zone" for electric bass with prime number tuning and "Tremolo of Joy" for his band with Charles Burnham, Briggan Krauss, Ed Tomney & Calvin Weston. Besides his own projects, Kato collaborates with Nicolas Collins, James Fei, Akamatsu Masayuki and Ursula Scherrer. As a bassist, he has worked with Eyvind Kang, Zeena Parkins, Marc Ribot, Michael Schumacher, and John Zorn, among many others. He is also a member of analog synthesizer collective, Analogos at Diapason Gallery.