From October to November 1971, the remains of seven bodies of the atomic bomb victims were exhumed and offered to their relatives at the Ninoshima Junior High School Agricultural Training Site in Ninoshima, Hiroshima.

　　From October to November 1971, the remains of seven bodies of the atomic bomb victims were exhumed and offered to their relatives at the Ninoshima Junior High School Agricultural Training Site in Ninoshima, Hiroshima. As a result of the full-scale excavation work, approximately 600 remains and 62 articles were also found. During the war, Ninoshima Island was a quarantine station for soldiers and military horses from overseas. After the atomic bombing, the island became an internment camp. Nearly 10,000 A-bomb survivors who had been injured by the bombing were brought to the island. In 1955, approximately 2,000 remains were moved to the War Memorial in Hiroshima Peace Park. It could not be assumed how many remains were still latent in Hiroshima, and many families still searched for the remains of their relatives.

　On September 15, 1894, before the outbreak of the Sino-Japanese War, the Imperial Headquarters was moved from Tokyo to Hiroshima. Emperor Meiji arrived in Hiroshima, and on October 18, a temporary Imperial Diet meeting was held, making Hiroshima the temporary capital of Japan. Japanese soldiers from all over Japan converged on Hiroshima, leaving from Ujina Port and returning home. In 1904, when the Russo-Japanese War broke out, the number of quarantine cases was five times that of the Sino-Japanese War, and a second quarantine station (disinfection station) was added, with a daily processing capacity of approximately 8,000 corpses, making it a large-scale quarantine station.

　From the summer of 1944, a training base for suicide attacks, such as the Marine Paratroopers, was established. Educational training was conducted using small plywood boats. The Fukaura area and part of the quarantine station were used for educational training for maritime suicide attack units of Type 4 meat attack boats (marure) and semi-submersible attack boats (maru-hase), which were loaded with drum explosives and assaulted enemy ships. The 10th Education Corps of the Army Ship Training Department, a secret unit, conducted educational training on Ninoshima Island.

　Immediately after the atomic bomb was dropped on August 6, 1945, the Japanese Army Ship Command (commonly known as the "Dawn Unit") selected the Ninoshima Quarantine Station to treat seriously injured A-bomb survivors. The Ninoshima Quarantine Station became a temporary field hospital, where A-bomb survivors were treated. On August 6, A-bomb survivors who had been exposed to the bombing in Hiroshima were brought to Ninoshima by boat one after another from around 10:00 a.m. The A-bomb survivors were brought to Ninoshima by boat at regular intervals. A-bomb survivors were transported at all times. Soldiers of the Dawn Unit, boy suicide attackers, and others carried out frantic internment, treatment, and nursing duties day and night. The islanders of Ninoshima also devoted themselves to relief efforts. The number of A-bomb survivors interned was estimated to be about 10,000. Based on testimonies and the number of remains that had been excavated, it was estimated that approximately 70% of the A-bomb survivors transported to the site had died.

　After the Hibakusha died, cremation began around August 10. Due to the rapid increase in the number of deaths, there was no longer time to cremate the bodies. Many bodies, whose identities remained unknown, were buried in the ground at various locations on the premises of the adjacent Army Horse Quarantine Station. After the war, the remains of A-bomb survivors were frequently collected, and in September 1945, quarantine station employees and others collected the remains and erected a memorial tower (a thousand-people mound) on the premises of the Mako Quarantine Station. Later, in July 1955, approximately 2,000 remains from Ninoshima were enshrined in the Hiroshima City Memorial Tower for the War Victims in Peace Memorial Park.