Eiri Kaji is a Japanese author best known for the crime thriller series 〝警視庁特犯課007〞 (Keishichou Tokuhanka 007), which follows the Metropolitan Police Department's Special Crimes Unit 007. Through multiple volumes including the 9th, 10th, and 11th installments, Kaji crafts intricate police procedurals that explore the darker corners of criminal investigation in Tokyo. The series has garnered a dedicated readership for its compelling narratives and authentic portrayal of law enforcement work. Kaji's writing demonstrates a keen understanding of both the psychological complexities of crime and the procedural details that bring authenticity to the genre.