Tadaaki Kuwayama's Untitled, 1961Tadaaki Kuwayama's Title unknownTadaaki Kuwayama's Untitled, 1965Tadaaki Kuwayama's Untitled (TK8596-'67), 1967Tadaaki Kuwayama's Untitled 9/10Tadaaki Kuwayama's Untitled, 2012Tadaaki Kuwayama's Untitled: red and blue', 1961Tadaaki Kuwayama's Untitled, 1966Tadaaki Kuwayama's Untitled, 1962