Thousands of people gathered in Hiroshima to commemorate the 80th anniversary of the world’s first wartime use of a nuclear bomb – as survivors, officials and representatives from 120 countries and territories marked the milestone with renewed calls for disarmament.

The western Japanese city was flattened on August 6, 1945, when the United States dropped a uranium bomb, codenamed Little Boy. Roughly 78,000 people were killed instantly. Tens of thousands more would die by the end of the year due to burns and radiation exposure.

The attack on Hiroshima, followed three days later by a plutonium bomb dropped on Nagasaki, led to Japan’s surrender on August 15 and the end of the second world war. Hiroshima had been chosen as a target partly because its surrounding mountains were believed by US planners to amplify the bomb’s force.

At Hiroshima’s Peace Memorial Park on Wednesday, where the bomb detonated almost directly overhead eight decades ago, delegates from a record number of international countries and regions attended the annual memorial.

Reporting from the park, Al Jazeera’s Fadi Salameh said the ceremony unfolded in a similar sequence to those of previous years.

“The ceremony procedure is almost the same throughout the years I’ve been covering it,” Salameh said. “It starts at eight o’clock with the children and people offering flowers and then water to represent helping the victims who survived the atomic bombing at that time.

“Then at exactly 8:15… a moment of silence. After that, the mayor of Hiroshima reads out the declaration of peace in which they call for the abolition of nuclear weapons around the world,” he added.

Schoolchildren from across Japan participated in the “Promise of Peace” – reading statements of hope and remembrance. This year’s ceremony also included a message from the representative of United Nations Secretary-General Antonio Guterres, urging global peace.

Hiroshima’s mayor, Kazumi Matsui, warned of the dangers of rising global militarism, criticising world leaders who argue that nuclear weapons are necessary for national security.

“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 United States and Russia still hold 90 percent of the world’s nuclear warheads.

“This situation not only nullifies the lessons the international community has learned from the tragic history of the past, but also seriously undermines the frameworks that have been built for peace-building,” he said.

“To all the leaders around the world: please visit Hiroshima and witness for yourselves the reality of the atomic bombing.”

Many attendees echoed that call. “It feels more and more like history is repeating itself,” 71-year-old Yoshikazu Horie told the Reuters news agency. “Terrible things are happening in Europe … Even in Japan, in Asia, it’s going the same way – it’s very scary. I’ve got grandchildren and I want peace so they can live their lives happily.”

Survivors of the bombings – known as hibakusha – once faced discrimination over unfounded fears of disease and genetic effects. Their numbers have fallen below 100,000 for the first time this year.

Japan maintains a stated commitment to nuclear disarmament, but remains outside the UN treaty banning nuclear weapons.

[Aljazeera]