Yazuo Sumi was born 1925 in Osaka.

He took his doctor`s degree in economics at the University of Ritsumeikan in 1950.

He became a member of Gutai group in 1955.

From the very beginning he used the wire network as support of a way of painting . After the group had assimilated to the European Informal, he made paintings, where the paint was applied by a vibrator.

1950 he joined in founding the group AU, in which he works until this days.