Crest-kamon-woodsorrel. The image is
The image is the design with stylized "seven leaves of wood sorrel ".
This image is originally from the Japanese family crest (kamon) which Chosokabe clan has been using.
The original file is seen here:
http://ja.wikipedia.org/wiki/カタバミ#/media/File:Chosokabe_mon.svg
The woodsorrel is called "katabami" or "???? in katakana" or "?? in kanji" in Japanese.. The image is