Meanwhile, thousands bowed their heads in prayer in Hiroshima on Wednesday to mark 80 years since an atomic bomb levelled the Japanese city.
Some 78,000 people were killed instantly when the United States dropped the bomb nicknamed “Little Boy” on Hiroshima on August 6, 1945.
The first atomic bomb dropped in war was followed by a plutonium bomb on Nagasaki three days later.
Representatives from a record 120 countries and territories including nuclear superpower the United States, and Israel, which neither confirms nor denies having nuclear weaponry, attended the annual ceremony at the Hiroshima Peace Memorial Park for the milestone year.
“Among the world’s political leaders, there is a growing belief that possessing nuclear weapons is unavoidable in order to protect their own countries,” he said, noting that the US and Russia possessed 90% of the world’s nuclear warheads.
Yoshikazu Horie, a 71-year-old tourist, expressed a similar sentiment.
“It feels more and more like history is repeating itself. Terrible things are happening in Europe … Even in Japan, in Asia, it’s going the same way, it’s very scary,” he said.
Hiroshima was the headquarters of some military units and a major supply base during World War Two. US war planners calculated that the surrounding mountains would concentrate the force of the bomb and enhance its destructiveness.
“Little Boy” unleashed a surge of heat reaching 4,000 degrees Celsius (7,200 Fahrenheit) and radiation that killed tens of thousands more by the end of the year. It was followed by Japan’s surrender on August 15.
In the decades following the attacks, those who survived, called “hibakusha”, often faced discrimination as rumours spread that they carried diseases and their offspring could be tainted. Their numbers fell below 100,000 for the first time this year.
* Japan, the only country to have suffered nuclear attacks, has stated its commitment to nuclear disarmament but is not a signatory or observer of the UN treaty to ban nuclear weapons.