Japanese scholars are trying to locate records of early research on the health impact of radiation from the 1945 U.S. atomic bombings of Hiroshima and Nagasaki to create a digital archive accessible to anyone.

The scholars began by searching for photos, records of medical treatment and other materials mainly from the 1940s to 1970s in the United States and Japan, said Masahito Ando, a professor of archival science at Gakushuin University's graduate school who is leading the government-funded, four-year research program that began in April.

"Although nearly 70 years have passed since the atomic bombings of Hiroshima and Nagasaki, the whole picture regarding records of atomic bomb damage is not really clear," he said.