On the night of Yoi Koshin, April 6, 1722, Hanbei — adopted son of a greengrocer in Aburakake-cho, Osaka — and his wife Ochiyo killed themselves at the Ikutama Daibutsu fundraising hall, driven by conflict with Hanbei's adoptive mother. The incident struck Osaka deeply. Within the same month, Chikamatsu Monzaemon wrote and premiered the sewa-joruri 'Shinju Yoi Koshin' at the Takemoto-za in Dotonbori. Depicting Hanbei's anguish caught between his adoptive mother's cruelty and his duty as a samurai-class husband, alongside pregnant Ochiyo's resolve, the play became one of Chikamatsu's late-period masterpieces and captivated all of Osaka. Their joint grave stands in Ginzan-ji's precinct, still visited today by Chikamatsu and Bunraku devotees.