Of the hundreds of schools of Ikebana in Japan, the Sogetsu School is one of the three leading schools. Students of the Sogetsu schools first learn the basic rules to instill the principles of good Ikebana design. Once a student graduates to freestyle, there are no restrictions. Anything can be arranged including non-plant material and the container does not necessarily have to be a vase. Sogetsu allows for more personal creativity than other schools.
Sofu Teshigahara (1900-1979) established the Segetsu School in 1927. He believed that Ikebana should be both enjoyable and creative.