It is said that during the ceremony for assuming the position of Kanto Kanrei in 1561, Kenshin was upset with the indecent behavior of Nagayashi NARITA, lord of Oshi-jo castle, and slapped him in the face with a sensu (folding fan).
永禄4年（1561年）、関東管領の就任式では忍城城主・成田長泰の非礼に激昂し、顔面を扇子で打ちつけたという。