Hibakusha is the Japanese word for survivors of the 1945 atomic bomb attacks on Hiroshima and Nagasaki. It is estimated that there were about 160 hibakusha who were present at both detonations. Getting an accurate count is difficult, as there is a common (mistaken) belief that hibakusha were weakened from radiation and passed that weakness down to their children and grandchildren, leaving many unwilling to disclose their experience.