Professor Chuta Tamagawa performed a pathological autopsy on a deceased Hibakusha in a board shed near the Hiroshima Teishin Hospital on October 11, 1945. He performed pathological autopsies on Hibakusha who were exposed to the Hiroshima atomic bomb dropped and exploded on August 6, 1945, and died of atomic bomb sickness at Hiroshima Teishin Hospital.

    Immediately after the atomic bomb exploded in Hiroshima, a temporary autopsy room was set up at the Hiroshima Hospital for Disaster Relief to perform pathological autopsies on A-bomb survivors who had died of atomic bomb-related diseases. The temporary autopsy room was part of a ward set up in a rapidly increasing number of hospitals to isolate A-bomb survivors suspected of having dysentery based on the use of blood in their stools. After being released from suspicion of dysentery, it became a temporary autopsy room.

　Professor Chuta Tamagawa performed pathological autopsies on deceased A-bomb survivors on October 11, 1945 in a board shed near the Hiroshima Teishin Hospital. He was exposed to the Hiroshima atomic bomb when it was dropped and exploded on August 6, and died of atomic bomb sickness at Hiroshima Teishin Hospital. Professor Tamagawa of the Hiroshima Medical College recorded the pathological autopsies of A-bomb survivors from August 29 to October 13. As his assistant, Dr. Shuzuo Miyasho of the Department of Internal Medicine recorded the pathological autopsy.

　Autopsy records of pathological autopsies of A-bomb victims survived from immediately after the atomic bomb exploded and destroyed Hiroshima on August 6. Professor Tamagawa of the Hiroshima Medical College conducted 19 pathological autopsies between August 29 and October 13, and all of the autopsy records have survived. The autopsies were conducted in a wooden hut near the Hiroshima Teishin Hospital (Naka Ward, Hiroshima City). The autopsies became a valuable record of pathology examining the early effects of radiation from the atomic bomb. They are kept by the Molecular Pathology Laboratory of the Graduate School of Molecular Pathology, now Hiroshima University, which had Prof. Tamagawa as its first professor.

 　Tamagawa (1897-1970) was transferred from an assistant professor at Okayama Medical College to a professor at Hiroshima Medical College in the spring of 1945, following the approval of the Hiroshima Medical College. on August 6, he was in Akita Takata City, the current site of the evacuation of Hiroshima Medical College. on August 8, he entered Hiroshima City. He asked the Hiroshima Prefectural Government for permission to perform a pathological autopsy, but was denied.

 On August 27, he left for Hiroshima City again, saying, "I have received reports of alopecia, subcutaneous hemorrhage, and a series of unknown lesions, so there is not a moment to lose. He requested the cooperation of Michihiko Hachiya, a junior colleague at Okayama Medical University and director of Hiroshima Telecommunications Hospital. Director Michihiko Hachiya put up a notice in the hospital warning against "atomic sickness" and felt the need for a pathological autopsy. Professor Tamagawa performed the pathological autopsy in a wooden barracks that had been built by the Ujina Army Ship Command's Dawn Unit in the backyard of Hiroshima Teishin Hospital. By October 13, he had dissected 19 cases. The hospital doctors who had been demobilized and students from Okayama Medical University who had come to help served as assistants and wrote down their dictations.

　The paper, "Autopsy Records of 19 Cases of Atomic Bomb Sickness in Hiroshima City," was published in the Science Council of Japan's "Report on the Atomic Bomb Disaster," which was published in 1953 after the end of the GHQ occupation. Professor Tamagawa of the Hiroshima University School of Medicine discovered cancer transformation in the epidermis of patients with keloids from the atomic bombing, and pathology and tissue specimens confiscated by GHQ were returned to Japan from the U.S. Army Institute of Pathology in 1973 and kept by the former Hiroshima University Institute of Original Medicine and others.