Stationery, greeting cards and envelopes in a packet labeled 'Origin of Ikebana', from Ikenobo. Ikebana (living flowers) is the Japanese art of flower arrangement, also known as kado (the way of flowers). Ikenobo is a school of Ikebana. It is the oldest school of Ikebana in Japan, having been founded in the 15th century. Donor's name and occasion information were not provided to the City Clerk's office.