The National Museum of Art (Osaka), The National Museum of Modern Art (Kyoto), Tokyo Metropolitan Art Museum, Hyogo Prefectural Museum of Art (Hyogo, Japan), The Museum of Modern Art New York, Museu de Arte Moderna do Rio de Janeiro (Brazil), Dallas Museum of Art (Dallas, Texas), etc.
Sadamasa Motonaga is one of the representative artists from the first generation of the Gutai Art Association. In his later career, Motonaga was also active as an author of children’s books, and his unique sense of humor is well known among people of all ages. Motonaga belonged to the Gutai group from 1955 to 1971. He developed innovative ideas one after the other, including the concept of “Water Sculpture,” which involves hanging vinyl bags filled with paint and water, his style of the traditional Japanese drip-painting method called “Tarashikomi,” his utilization of airbrush techniques for scattering acrylic paint, and others. Motonaga was immersed in the overseas art world from his early career through contracts with Martha Jackson Gallery (New York) and the International Centre of Aesthetic Research (Turin, Italy). The artist is highly acclaimed and has participated in international exhibitions, such as the Venice Biennale, the Seoul International Print Biennale, the Torino Premio Risone International Exhibition, and others.