Oba Yozo is a fictional character from the Japanese novel "No Longer Human" written by Osamu Dazai. The story, published in 1948, explores themes of alienation and the struggle for identity through the life of Yozo, who feels disconnected from society and struggles with his own sense of self. Yozo's character is marked by deep emotional turmoil and a sense of despair. He often resorts to various coping mechanisms, including relationships and substance abuse, to escape his feelings of inadequacy. The novel is considered a classic of Japanese literature and reflects the author's own experiences with mental health issues.