The exhibits in the Museum’s permanent exhibition are regularly changed, to prevent deterioration resulting from display and to preserve the items over a long period of time. From June 1, 2020, four clothes exhibits from the Black Rain, Conditions in Relief Stations, and Damage from Radiation sections were changed.
　On display at the Conditions in Relief Stations section are the monpe jacket and dress worn by Setsuko Ogawa (21 years old at the time of the bombing) when the bomb hit. Setsuko suffered burns on her face and back, and was taken to Ninoshima Island where there was a temporary field hospital. Her mother Ritsu nursed her devotedly, but Setsuko passed away on August 11. Ritsu had been keeping these clothes carefully in a package with a note: "Please place these in Ritsu's coffin."
　The exhibition sections mentioned above will be changed regularly once a year.