Toru Ikemoto was seven years old and his sister, Aiko, was nine when Hiroshima was destroyed. Both were indoors, around 1 kilometre from the hypocentre.

Within four or five days of the attack, their hair started falling out and they experienced fevers and bleeding gums – symptoms of acute radiation poisoning.

While both recovered from the acute stage of the illness, they ultimately succumbed to the delayed effects of radiation. Toru died at age 11 and Aiko at 29.