A survivor of the atomic bombing of Nagasaki joined activists and diplomats Monday to press Japan and other countries to quickly ratify a landmark treaty banning nuclear weapons.

"None of them having (nuclear) weapons will contribute toward having peace," Tokuko Kimura, 82, told an audience at a New York event. She was 10 when the United States dropped an atomic bomb over her city on Aug. 9, 1945, three days after detonating another device over Hiroshima.

Akira Kawasaki, international steering group member of the International Campaign to Abolish Nuclear Weapons, which won this year's Nobel Peace Prize, expressed hope that the treaty would take effect as soon as possible.