Abstract
Kihonkei (The basic form), proposed by Tsuruzo Ishii is an useful structural concept which to be promoted establishing onto Art theory and The theory of plastic art. That is a structure not by the shape measurement such as elevation, but acquired by applying the feeling from a model directly on solid. The method is established there which turns a given solid into modern art object by releasing the sculpture shape its perceptible surface. From this, real aspect of art that composed from visible form and unperceptually feeling contents would be unfolded and drawn a principle that should be amplificated toward the modern art.