‘Atomic bomb hell can’t be repeated’ say Japan’s last survivors

She has never been able to forget the journey home.

“It was a scene from hell,” says Michiko. “The people who were escaping towards us, most of their clothes had completely burned away and their flesh was melting.”

She recalls seeing one girl – all alone – about the same age as her. She was badly burnt.

“But her eyes were wide open,” says Michiko. “That girl’s eyes, they pierce me still. I can’t forget her. Even though 78 years have passed, she is seared into my mind and soul.”

Michiko wouldn’t be alive today if her family had remained in their old home. It was only 350m (0.21 miles) from the spot where the bomb exploded. About 20 days before, her family had moved house, just a few kilometres away – but that saved her life.

Estimates put the number of lost lives in Hiroshima, by the end of 1945, at about 140,000.

In Nagasaki, which was bombed by the US three days later, at least 74,000 were killed.

Sueichi Kido lived just 2km (1.24 miles) from the epicentre of the Nagasaki blast. Aged five at the time, he suffered burns to part of his face. His mother, who received more serious injuries, had protected him from the full impact of the blast.

“We hibakusha have never given up on our mission of preventing the creation of any more hibakusha,” says Sueichi, who is now 83 and recently travelled to New York to give a speech at the United Nations to warn of the dangers of nuclear weapons.

When he woke up after fainting from the impact of the blast, the first thing he remembers seeing was a red oil can. For years he thought it was that oil can that had caused the explosion and surrounding devastation.

His parents didn’t correct him, choosing to shield him from the fact it had been a nuclear attack – but whenever he mentioned it, they would cry.