Inspector Nakamura is a supporting character in the story of Pluto, serving as a Japanese police inspector who works alongside the more seasoned Inspector Tawashi. He is a colleague of Tawashi and is also acquainted with the robots Atom and Uran, as well as Professor Ochanomizu. In the narrative, Nakamura is typically seen investigating crime scenes and interacting with the main robot characters, particularly Atom and Uran. For instance, he is present when Uran uses her unique abilities to calm animals at a crime scene, an event that leads to him and his partner questioning her afterward. During this encounter, he and Atom also briefly meet, with Atom apologizing for Uran's behavior.

Inspector Nakamura is portrayed as having a generally approachable and friendly personality. However, he also displays a more bureaucratic side, as he can be somewhat inflexible when it comes to handling emergencies. This suggests a personality that is professional and by-the-book, distinguishing him from perhaps more intuitive or unconventional characters. His role in the story is primarily functional, providing a human law enforcement presence in Japan and supporting the main narrative by reacting to the events involving the advanced robots. Information regarding his background before the events of the story, his personal motivations, his development over the course of the narrative, or any notable abilities is not detailed in the source material. His relationships are largely defined by his professional capacity as an inspector and his established acquaintance with the key robot characters and their creator.