Mono-ha was an art movement based in Japan, active from around 1968 to 1975.  The artists tended to present natural and industrial materials such as stone, soil, wood, paper, cotton, steel plates, and paraffin—”things” (mono)—on their own or in combination with one another.  Contrary to the mainstream anti-art tendencies of Zenēi Bijutsu (avant-garde art), Mono-ha attempted to reconfigure art through the reduction of objects to their primary form. 

Unaltered, natural matter and objects were considered not as material, but in and of themselves significant and autonomous.  Attempts were made to draw out a kind of artistic expression from matter by directly engaging in its being (ari-yō), perception, and relations. (~ text)

Susumu Koshimizu, Paper, 1969

Susumu Koshimizu, Crack the stone in August ’70, 1970

Lee Ufan, Things and Words, 1969 

Lee Ufan,  Relatum,1971

Nobuo Sekine, ?