Ichinyū was the fourth generation of the Raku line of potters. He died in 1696, aged 59. He took the name Ichinyū when he became a lay Buddhist in 1691 and went to live at the Baiko temple at Yamada near Kyoto.
He typically uses a black glaze with an underlying slight reddish tinge. His teabowls characteristically have a small foot compared with this of the other Raku masters.