Ikebana
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).