Sunday marks the 70th anniversary of the second and last atomic bombing by U.S. forces in Japan.
The Associated Press reports the city of Nagasaki is using the occasion to renew calls to abolish nuclear weapons and halt the Japanese government's push to loosen restrictions on what its military can do.
Victims of the bombing of the port city of Nagasaki were remembered with a moment of silence and wreath presentation that included Prime Minster Shinzo Abe.
The attack on Nagasaki killed more than 70,000 people and prompted Japan to surrender in World War Two.
The attack came three days after the U.S. dropped a bomb on Hiroshima killing tens of thousands of people.