A symbolic flame kept alive since the aftermath of the 1945 U.S. atomic bombing of Hiroshima will be used to light a peace monument to be built at Pearl Harbor in Hawaii, the family of a well-known atomic-bomb victim said Thursday.

The idea was proposed by the family of Sadako Sasaki, who died at age 12 of radiation-induced leukemia 10 years after the bombing.

"We want this to be a sign of how Japan and the United States, once enemies, have overcome their hatred," the family said, adding there are plans to transport the flame in the summer of 2022 with the help of private donations.