One of the new features in ikebana introduced by Sofu Teshigahara, founder of the Sogetsu school, was abstract freestyle arrangements using nonorganic materials. Sofu, who was fascinated by modern western avant-garde movements such as Cubism and Surrealism, started experimenting with what he called avant-garde ikebana, or Zenei-bana, at the end of the 1920s, using scrap metal and other unconventional materials.
Although Sogetsu ikebana is again turning to more naturalistic arrangements, the avant-garde ikebana is still an important style. I was handed a plastic chopping board by my teacher to be used as the main material for a series of ikebana arrangements. As many variations as possible using one Aspidistra leaf, two Carnations and three straws of Bear grass in a green on green composition.