
Mon have their roots in Japan through the transmission of the Chinese culture of the T'ang Dynasty (618-907) to the Japanese court. Chinese emblems of the Sun and Moon, Blue Dragon, White Tiger and Three-legged Crow were symbols of the early Japanese sovereigns.




Around the end of the thirteenth century and the beginning of the fourteenth crests mon began to be associated with individual family units. The rise of kamon was accelerated by the adoption of a rule of primogeniture for the inheritance of an estate, which forced younger sons to form independent families of their own, often taking a new surname in the process. The Minamoto clan contained 4 subclans, 27 major branches and 569 different surnames by the end of the feudal period. Common clan emblems no longer served to delineate such numbers accurately. New variations on crests were created to represent newly independent families.



The crests of the three "great unifiers" of Japan, in descending order: Oda Nobunaga (1534-1582); Toyotomi Hideyoshi (1536-1598); and Tokugawa Ieyasu (1543-1616). Oda's crest is a China flower, a Chinese design not based on any specific flower, enclosed by a court pattern dating back to T'ang China. Toyotomi's crest is a paulownia flower pattern. The most popular design of all Japanese mon, the paulownia is considered an emblem of the imperial throne, and was bestowed upon Toyotomi by the imperial court. According to Chinese legend, the phoenix, bird of immortality, alights only in the branches of the paulownia when it returns to earth. The design is now a symbol of the Office of the Prime Minister of Japan. Tokugawa's crest is the hollyhock, a plant associated with a presitigious Kyoto shrine.
During the Tokugawa shogunate, the use of mon spread from the samurai and warrior classes to the peasant and merchant classes, and to the artisans, Kabuki actors and courtesans of the floating world of the Edo period. Crests became a common element of all classes. Hank Mukai tells me the Mukai kamon was selected primarily for its form. The crest is composed of a trifoliate clover-like wood sorrel leaf with three stylised sword blades inserted between each of the leaves and three blades penetrating from the leaf stem. The crest is similar to the above wood sorrel mon. The wood sorrel (katabami) produces many seeds and reproduces vigorously; this characteristic was seen as a token of future proliferation and prosperity. The wood sorrel is also known as the mirror plant (kagamigusa). It was used for polishing bronze mirrors, as well as forming a medicinal salve. The wood sorrel mon enjoyed much popularity among the samurai class.