The aftermath of the atomic bombings over Hiroshima and Nagasaki left profound scars in Japan, impacting not only the two nations involved, but reverberating throughout the world. Today, reminders of the devastation persist in Japan, embodied by haunting human shadows etched into stone.
Dropping the atomic bombs on Hiroshima and Nagasaki
On August 6, 1945, the United States unleashed the atomic bomb Little Boy upon Hiroshima. Three days later, another, dubbed Fat Man, was dropped over Nagasaki. The detonation caused by the former amounted to the explosive force of 15,000 tons of TNT, while the latter’s yield equated to 21,000 tons.
Both bombs unleashed a surge of thermal energy across their respective cities, flattening approximately five and three square miles, respectively. These explosions were triggered by nuclear fission, wherein a neutron collides with the nucleus of a heavy atom, such as Uranium-235 in Little Boy or Plutonium-239 in Fat Man, resulting in the splitting of the nucleus and the release of a substantial amount of energy.
In the aftermath, Hiroshima saw between 70,000-135,000 individuals perish instantly or succumb to radiation poisoning in the months following Little Boy‘s deployment. Nagasaki suffered approximately 60,000-80,000 fatalities. Soon after, on August 15, Emperor Hirohito announced Japan’s surrender, with the official declaration signed on September 2, 1945.
Sumitomo Bank
The Hiroshima branch of Sumitomo Bank was built in 1928 from reinforced concrete. On August 6, 1945, it was planning to open as usual. Several workers had already arrived and were preparing to welcome patrons, while others were still en route. The doors had yet to open to the public.
That morning, an unidentified person was sat upon the stone steps at the bank’s entrance, waiting for it to open. At 8:15 AM, Little Boy was dropped from the Boeing B-29 Superfortress Enola Gay, and, 45 seconds later, detonated 260 meters away.
The exterior of the bank remained relatively intact, considering an atomic bomb had exploded so close to it. However, the interior was completely destroyed. Of the employees already inside and those on their way to work, 29 were killed instantly, and many of the survivors later died from radiation sickness.
Human shadow on the steps of Sumitomo Bank
What happened to the unknown person on the steps of Sumitomo Bank? When Little Boy detonated, they were either killed instantly or unable to move before passing away. Many believed they were vaporized by the bomb, but such an event has been scientifically proven to be impossible. Instead, the ground surface temperature, estimated to have ranged between 3,000 and 4,000 degrees Celsius, likely caused the individual to become severely inflamed and their skin ulcerated.
Interestingly, in the spot where the person was sitting, a black mark was left behind. This has since become known as the “Human Shadow Etched in Stone” – or the “Human Shadow of Death” – and is one of many in Japan believed to be the residue left behind by those who were instantly killed by the atomic bombs.
These shadows were caused by the radiant heat from the bombs dropped on Japan, which bleached the surfaces surrounding both humans and objects, with them involuntarily acting as shields from the exposure. In reality, those black stains are the true color of the surroundings before Little Boy and Fat Man detonated.
As explained by the Google Cultural Institute, “Receiving the rays directly, the victim must have died on the spot from massive burns. The surface of the surrounding stone steps was turned whitish by the intense heat rays. The place where the person was sitting became dark like a shadow.” As each bomb caused intense heat and light to explode outward from the point of implosion, any person or object between it and the surrounding surfaces created a shadow.
The steps from Sumitomo Bank are now on display
Deaths from radiation exposure continued to occur in Hiroshima and Nagasaki for seven to eight weeks following the dropping of the atomic bombs, and rebuilding the cities took approximately two years. However, the aftermath of the atomic bombs was still visible for long after.
As the structure of Sumitomo Bank had remained largely undamaged, the institution was rebuilt in the same spot. The Human Shadow Etched in Stone subsequently became a landmark, and employees took steps to protect it. In 1959, the bank put up a fence around where the human shadow was located, and eight years later covered it in tempered glass to prevent any further deterioration.
In 1971, Sumitomo Bank went through renovations and the steps were removed and donated to the Hiroshima Peace Memorial Museum. They’ve since undergone restoration to reverse some of the erosion that occurred, and are currently on display as a reminder of the effects of nuclear warfare.
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“I think it is very important to keep in mind the consequences of the use of nuclear weapons,” said Alex Wellerstein, assistant professor of science and technology studies at the Stevens Institute of Technology in New Jersey.
“It is very easy to regard these weapons as tools of statecraft and not weapons of mass destruction. The nuclear shadows serve as a potent reminder of the human cost of [atomic weapon] use.”
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