To remember their gratitude towards Shigeharu, the Kuroda family consequently adopted the family crest of the Takenaka family as theirs (this family crest refers to Kuromochi. Kuromochi is a family crest to hope for an increase in the amount of koku).
このため、重治への感謝の気持を忘れないために黒田家は家紋に竹中家の家紋を用いた（この家紋とは黒餅の事を指す。黒餅とは石高の加増を願う家紋である）。