Q:What type of details about susumu koshimizu  can be gathered from the following bio?  Bio: he is one of the key members of mono-ha , a group of artists who became prominent in the late 1960s and 1970s . mono-ha was the name given to a loosely associated group of artists whose work was stridently anti-modernist -- consisting primarily of sculptures and installations that incorporated basic materials such as rocks , sand , wood , cotton , glass and metal , often in simple arrangements with minimal artistic intervention . from early on , susumu koshimizu 's investigation of material and space resulted in some of mono-ha 's most definitive artworks . koshimizu 's installations and sculptures during the 1960s and 1970s focused on the qualities inherent to but not visible in an object . yet , he shows concern for the materiality of objects -- a desire to expose the fundamentals of sculpture , often revealed through juxtaposition . `` in paper -lrb- formerly paper 2 -rrb- '' -lrb- 1969 -rrb- , he placed a large stone inside an even larger envelope of japanese paper , open on one side . viewers were able to look inside and -- in the sculptural context of relating interior structure to exterior form -- were confronted with the sheer size and solidity of the stone in contrast to the thin membrane of paper that covers it . `` crack the stone in august ' 70 '' consisted of an immense block of granite split in two at the national museum of modern art , tokyo . at that time , koshimizu was exploring the fundamentals of sculpture without the need for juxtaposition : splitting open the stone and exposing its inside was a means to show the materiality and presence of the rock itself . at the beginning of the 1970s , koshimizu started to explore specifically the structure of surfaces . a single installation , `` from surface to surface -lrb- wooden logs placed in a radial pattern on the ground -rrb- '' -lrb- 1972/2004 -rrb- is a good example . the work is composed of thirty , thirteen-foot-long square beams of wood , the surfaces of which have been sliced at varying intervals and angles to create undulating expanses...
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