HIROSHIMA — Teruko Yahata was eight when she saw a blueish-white light envelop the sky over her home city of Hiroshima one summer morning, moments before the first atomic bomb explosion knocked her unconscious and levelled swathes of the Japanese city.

Now 86, she is eager to be among the first to see the film Oppenheimer at its delayed opening in Japan on March 29, hoping the biopic of the scientist who led the development of the bomb will reinvigorate debate over nuclear weapons.