This thesis explores the relationship between the Japanese urban myth of Kuchisake-onna and expectations of motherhood in postwar Japan. The following study was performed with the goal of establishing Kuchisake-onna’s spontaneous emergence in 1970s Japan as a response to the Ūman Ribu (a contracted transliteration of “Women’s Liberation”) Movement, a new wave of feminism. Historically, a Japanese nuclear family unit (ie) was considered to be fundamental to the structure and stability of the nation. As women increasingly sought to shift from their roles as mothers within the domestic sphere in order to pursue employment outside as sararī ūman (“salary woman”), the ie was threatened. At the same time, unrealistic expectations and the pressure of motherhood resulted in numerous cases of filicide in Japan in the 1970s. This research study engages textual history, feminist theory, news/magazine articles, and an analysis of the film Carved: The Slit-Mouthed Woman (2007). I conclude that Kuchisake-onna’s representation within Carved: The Slit-Mouthed Woman serves to address a perceived need for liberation from the overly rigid expectations that mothers in 1970s Japan faced to excel within their roles as the custodians of the domestic sphere. However, it also allows for a reading whereby the Kuchisake-onna’s emergence cannot be attributed to a single notion of the ‘good’ or ‘bad’ mother. Rather, it is the failure of the ie system which creates insurmountable pressures for these women to fulfill the role of the perfect mother which allows for the manifestation of Kuchisake-onna.