I guess this is the best place to put this?

It seems that high-class Japanese families had family crests which first appeared around the 11th century. I was able to find the one below and a bit of history about them.

This one is a stylized representation of the hollyhock (aoi). The Tokugawa one is known as aoi-no-mon in Japanese and used by all members of the Tokugawa clan.

These emblems were used by military families of the feudal age (feudalism came to an end with the end of the Tokugawa period) - not only was clothing marked with them but marked with banners, curtains, also furnishing and household belongings.

In the Meiji period (1868-1912), many of the common people adopted family crests bearing some connections with their newly assumed family names. The design were drawn from a variety of objects - the sun, the moon, stars, plants, animals, geometrical shapes and ideograms. Up until the Meiji period it seems these were strictly for the use of samurai families and upwards.