ancestral hometown or consult one of the many genealogical publications available. Many websites also offer lookup services. Professional wedding planners, undertakers and other "ritual masters" may also offer guidance on finding the proper . are seen widely on stores and shops engaged in traditional crafts and specialties. They are favored by sushi restaurants, which often incorporate a into their logos. designs can even be seen on the ceramic roof tiles of older houses. designs frequently decorate , , tofu and other packaging for food products to lend them an air of elegance, refinement and tradition. The paulownia appears on the obverse side of the 500 yen coin. Items symbolizing family crafts, arts or professions were often chosen as a ; likewise, were, and still are, also passed down a lineage of artists. Geisha typically wear the of their (geisha house) on their clothing when working; individual geisha districts, known as , also have their own distinctive , such as the plover crest () of Ponto-chō in Kyoto. A woman may still wear her maiden if she wishes and pass it on to her daughters; she does not have to adopt her husband's or father's . Flowers, trees, plants and birds are also common elements of designs. also add formality to a kimono. A kimono may have one, three or five . The themselves can be either formal or informal, depending on the formality of the kimono, with formality ranging from the most formal 'full sun' () crests to the least formal 'shadow' () crests. Very formal kimono display more , frequently in a manner that makes them more conspicuous; the most formal kimono display on both sides of the chest, on the back of each sleeve, and in the middle of the back. On the armor of a warrior, it might be found on the (helmet), on the (breast plate), and on flags and various other places. also adorned coffers, tents, fans and other items of importance. As in the past, modern are not regulated by law, with the exception of the Imperial Chrysanthemum, which doubles as the national emblem, and the paulownia, which is the mon of the office of prime minister and also serves as the emblem of the cabinet and government (see national seals of Japan for further information). Some local governments and associations may use a as their logo or trademark, thus enjoying its traditional protection,