"The Box Man" is a surreal narrative about a man who chooses to live as a homeless individual, inside a box, in Tokyo. The protagonist, a former doctor, narrates his experiences and observations from within the box, and the narrative often blurs the line between reality and hallucination. The book is a philosophical exploration of identity, anonymity, and the nature of existence, challenging the reader's perception of what it means to be an individual in society.

This novel explores the profound psychological journey of a man disfigured in an accident, who becomes obsessed with creating a mask so perfect it allows him to reintegrate into society unnoticed. Through his meticulous crafting, he not only seeks physical camouflage but also grapples with the deeper existential questions of identity and alienation. As he dons his new face, the boundaries between his true self and the persona he projects begin to blur, leading him into a complex web of deception, introspection, and ultimately, a confrontation with the essence of who he really is. The narrative delves into themes of visibility, the nature of selfhood, and the masks people wear, both literal and metaphorical, to navigate the social world.