These family crests (In Japanese, KAMON) are called 'Hato-Mon' in JAPAN.
Dove were referred to as oracles of Hachiman, a Bodhisattva that was worshiped as a god of war. Therefore it is said that if military commanders wrote the name of the Bodhisattva on their banners, the birds were invariably drawn to them. Thus it became common for military leaders to adopt dove patterns as their family crests. In these crests, doves are often combined with other motifs, In these crests, doves are often combined with other motifs, such as Hoya (mistletoe) and Torii.