In each daimyo family, the family head and all vassals including karo (chief retainer) and other retainers regardless of their rank believed that it was the proof of fealty to the family of their lord to respect and maintain kafu.
各大名家においては当主や家老以下の家臣を問わず家風を尊重・保持することが御家への忠誠の証と考えられてきた。