The family crest of 'Kokumochi' nichirin-mon marked in the body of the armor worn by Nagamasa KURODA, the founder of the Fukuoka Domain, was later designated as the trademark of this school.
福岡藩の初代藩主である黒田長政の鎧の胴中紋の「コクモチ」日輪紋を流印として陽流と定める。