Atomic bomb survivors in Hiroshima and Nagasaki, along with members of anti-nuclear groups and relatives of Japanese nationals abducted by North Korea expressed anger Friday over the North's fifth nuclear test.

Hiroshi Harada, a former director of the Hiroshima Peace Memorial Museum who survived the Aug. 6, 1945, U.S. atomic bombing of the city, lashed out at North Korea, saying the country "conducts nuclear tests because it has no idea about the tragic consequences of using nuclear weapons."

"The United Nations is not doing its job, and (thus) North Korea could repeat its actions," Harada, 77, said, referring to repeated nuclear tests despite U.N. Security Council sanctions against Pyongyang.