Both 'Saya-ate' and 'Hikozo KOKIN' were Kabuki kyogen plays written by Nanboku TSURUYA Ⅳ, and 'Okuma SHIRAKOYA' was a factual attempted murder happened in 1727.
このうち「鞘当」と「古今彦惣」はともに鶴屋南北(4代目)作の歌舞伎狂言、「白木屋お熊」は享保27年(1727)に実際におきた殺人未遂事件である。