Ikebana a piece's color combinations, natural shapes, graceful lines, and the implied meaning of the arrangement. Another common but not exclusive aspect present in "ikebana" is its employment of minimalism. Some arrangements may consist of only a minimal number of blooms interspersed among stalks and leaves. The structure of some Japanese flower arrangements is based on a scalene triangle delineated by three main points, usually twigs, considered in some schools to symbolize heaven, human, and earth, or sun, moon, and earth. Use of these terms is limited to certain schools and is not customary in more traditional schools. A notable exception
Ikebana principles, but there are in Tokyo and Kyoto many masters of "ikebana" who teach the simpler forms of "Ko-ryū", and "Ko-Shin-ryū" of the Genroku and Tenmei eras. The oldest international organization, Ikebana International, was founded in 1956. Her Imperial Highness Princess Takamado is the honourary president. Followers and practitioners of "kadō", from pupil to teacher, are known as "kadōka" (華道家). A "kadō" teacher is called . The term comes from "sen" or "saki" (before) and "sei" (life) – i.e. one who has preceded you. Noted Japanese who practiced it include Junichi Kakizaki, Mokichi Okada, and Yuki Tsuji. Tsuji was at