ikenobo is very well known. until the mid-edo period it was only for upper class people. ikenobo was started by a buddhist priest called ikenobo senkei in the 15th century. it uses standing flowers (called "rikka"). it is a buddhist way of showing the beauty of nature. there are 7 branches. each branch represents something in nature, e.g. a hill, valley, waterfall etc. later, in the 17th century, it became simpler and was called "shoka". shoka uses just 3 branches called "ten" (heaven), "chi" (earth) and "jin" (man).