The outer octagonal ring represents the cross-section of a Japanese feudal period sumi-kiri musket barrel. Contained inside the octagonal ring is a family crest of crossed hawk feathers, which represent the spiritual vitality and strength needed to subdue any attackers. It has thus has been a samurai family crest for good fortune since ancient times. The overall meaning of this crest is the presence of a strong fighting spirit, even if faced with overwhelming danger.