How does ritualized violence become a meaningful practice? This project explores how Yukio Mishima engages with seppuku and sacrificial violence as embodied and aesthetic practices across his short story Confessions of a Mask, his film Patriotism, and Paul Schrader's Mishima: A Life in Four Chapters. Traditionally associated with samurai honor, seppuku involves an intensely physical and ritualized form of self-inflicted death. In Mishima's work, it appears alongside recurring images of the body, desire, and discipline. Confessions of a Mask presents a protagonist shaped by violent fantasies and the need to perform a socially acceptable identity. Patriotism stages ritual suicide with a stylized and controlled aesthetic that turns violence into something deliberate and composed. Schrader's film brings these elements together by portraying Mishima's life as a continuous performance that culminates in his final act of seppuku. Through literary and film analysis, this project examines how repeated representations of violence function as practices that shape identity, aesthetics, and meaning.