The idea was taken from that, when a blind actor took a misstep due to his enthusiastic performance, an accompanist Shamisen (Japanese stringed instrument) player used his wit to played strongly to cover his mistake.
盲目の俳優が熱演のあまり足を踏み外したのを伴奏の三味線の機転で強い音を出したのが好評で生まれた。