Ikebana room decoration and commenced in a rudimentary way to consider natural beauty in floral arrangement. At this time "ikebana" was known as "rikka". This same age conceived another form called "nageirebana". "Rikka" and "nageirebana" are the two branches into which "ikebana" has been divided. Popularity of the two styles vacillated between these two for centuries. In the beginning, "rikka" was stiff, formal, and more decorative while "nageirebana" was simpler and more natural. Although "nageirebana" began to come into favour in the Higashiyama period, "rikka" was still preferred, and "nageirebana" did not truly gain popularity until the Momoyama period, about a
Ikebana "nageirebana", or "ikebana", advanced rapidly in favour and developed great beauty of line. The exponents of the art not only studied nature freely, but combined this knowledge with that of "rikka", the result bringing "ikebana" to a very perfect state of development. After the Tenmei era, the purest and best taste in "ikebana" began to diminish, and a formal and artificial form of arrangement came into existence. This is the present form, which has a fixed rule or model known as heaven, human, and earth. The most popular schools of today, including "Ikenobō", "Enshū-ryū", "Mishō-ryū", among others, adhere to these