Officials of Nihon Hidankyo, or the Japan Confederation of A- and H-Bomb Sufferers Organizations, renewed their call for a world without nuclear weapons Monday, on the 70th anniversary of the group’s establishment.

At a news conference held near the hypocenter of the atomic bomb dropped by the United States on the city of Nagasaki on Aug. 9, 1945, Nihon Hidankyo co-chair Terumi Tanaka, 94, recalled the group’s founding, which he witnessed as a university student.

“Hibakusha (atomic bomb survivors) throughout Japan started a movement with vigor,” he said. “It is the hope of hibakusha that the world should not have nuclear weapons.”