Japanese Kamon (family crest) with tsu design.
Japanese family crests
Japanese Kamon Design : Botan Synmetry
kamon / 雪輪覗き唐花
[flower crest] Morning glory, goldthread, wisteria, chrysanthemum. Kamon are Japanese emblems or crests, corresponding to the European heraldy tradition, and are used to specifically represent and identify a family.