A comparative study report on the development of child survivors of atomic blasts and those unexposed to radiation by the first chair of the Nagasaki Atomic Bomb Survivors Council, Kamekichi Sugimoto, who died in 1979 at 77, has been discovered in the city of Nagasaki. The documents were retrieved from a family member's home within the city.

The discovery has spurred experts to praise the significance of Sugimoto's contribution to research on the effects of atomic radiation, saying the newly discovered documents serve as proof that Sugimoto pioneered the research.

Experts point out that Sugimoto's dedication and work to support the survivors of the atomic blasts have not been widely known, and Sugimoto himself lost his closest family members in the Nagasaki bombing.