Central protagonist of the series. Initially a detective in the First Investigation Division, he is promoted to head of the Investigation Headquarters by 1957. Known for leading complex murder investigations, utilizing forensic evidence, and conducting extensive fieldwork across Tokyo.
Team member assisting with witness coordination and case documentation.
Supporting detective involved in field operations and surveillance.
Reports directly to the Chief, receiving case directives and oversight.
Team member assisting in evidence collection and suspect interviews.
Fellow detectives working under the same division, sharing investigative duties.
Core partners within the First Investigation Division, collaborating on the murder case.