Daisaku Cho, Japan
Private collection, Japan
Acquired from the above by the present owner
Charlotte and Peter Fiell, eds., Decorative Art 70s, Cologne, 2000, p. 99 for the chairs
Junzo Sakakura, Architect: Living in Modernism: Housing, Furniture and Design, Tokyo, 2009, p. 99, fig. 204, p. 100, p. 134, fig. 192, p. 138, fig. 197, p. 140, ref. 23, p. 141, fig. 196, p. 165 for a technical drawing, a prospectus and images