However, the reason for the change of style might be attributed to the loss of books on tenkoku (engraving letters on the material of a seal) and other materials kept in the family for generations in the fire in Zoroku HAMAMURA V's time.
しかし、四世蔵六のとき代々伝えられた印籍類が火災で焼失したことが原因とも考えられる。