cherry blossom

kirsikankukinta The blossom of the cherry tree.
puhekieltä A stylized depiction of the blossom of the cherry tree, as used in Japanese mon.
1976 — W. M. Hawley & Kei Kaneda Chappelear, Mon: The Japanese Family Crest, p. 27

The cherry blossom was in use in Heian times...For obvious reasons it become the mon of the Sakurai family.