In early October 1945, he was admitted to Hiroshima Army Hospital No. 1. Due to acute symptoms of radiation damage caused by exposure to the atomic bomb, most of the hair on his head had been lost from the front, sides, and back of his head.

  　Japanese Army soldiers exposed to the atomic bomb were interned at the camp for the injured of the Army Ship Training Department, located in Ujina, about 4 km south-southeast of the hypocenter of the Hiroshima atomic bomb, and in early October 1945, they were admitted to Hiroshima Army Hospital No. 1. Due to acute symptoms of radiation damage caused by exposure to the atomic bomb, most of the hair on their heads had been lost from the front, sides, and back of the head. The main symptoms of the third to fifth week of acute damage to the human body were hair loss, hemorrhage including purpura, and lower hemorrhage, causing death with general weakness.

　Ujina, Hiroshima, was a port area, more than 3 km from the hypocenter, and suffered relatively little damage from the atomic bomb. The people who had been exposed to the atomic bomb in Hiroshima rushed to this area, which had survived the fire. One of the facilities that provided aid to the injured in Ujina was the Army Ship Training Depot. The Army Ship Training Department was an organization that provided education and training in ship operation to army units, and was stationed in the confiscated Daiwa Spinners Hiroshima factory. Since the number of troops receiving training was constantly changing, the barracks were not always full. There was also a stockpile of food, so there was no shortage of meals for about 1,000 people. At 8:15 a.m. on August 6, an atomic bomb was dropped on Hiroshima, and although the building was slightly damaged by the explosion, it was not seriously damaged. About an hour later, the injured began to arrive. By 3:00 p.m. on August 6, several hundred A-bomb survivors had been admitted to the hospital. The Army Ship Training Department became what should be called a field camp. Many of the inmates were seriously ill with A-bomb disease, and from August 10 to mid-September, approximately 3,000 people died.

　The Army Ship Training Center, which had been a field camp, was reorganized by order of the Ship Command and became the Army Ship Training Center Temporary Field Hospital on August 12, and with the defeat of Japan on August 15, the military wartime system was liberated. On August 25, the nameplate of Hiroshima First Army Hospital Ujina Branch was hung. During this period, the Army Ministry Investigation Team entered the area on August 8, and the 2nd Investigation Team on August 14. Using the Ship Training Department as a base, they were engaged in the investigation of the atomic bombing.