There’s something almost impossible to wrap your head around when you first hear it. A man survives the most destructive weapon ever used in war. He watches his city burn. He steps over broken bodies as a child. And then, decades later, he dedicates his life not to mourning his own people — but to hunting down the families of the soldiers who dropped that bomb, to tell them their sons didn’t die alone.
That man was Shigeaki Mori. And his story is one of the most quietly remarkable in modern history.
Mori, a Japanese historian and atomic bomb survivor from Hiroshima, passed away on March 14, 2026, at the age of 88. But the life he lived between that August morning in 1945 and his final breath was the kind of story that doesn’t fit neatly into any news headline. This is the full biography of Shigeaki Mori — the boy who survived, the man who remembered, and the historian who refused to let anyone be forgotten.
Who Was Shigeaki Mori? A Quick Overview
Shigeaki Mori (森 重昭) was a Japanese amateur historian, atomic bomb survivor (hibakusha), author, and peace advocate. He was born on March 29, 1937, in Hiroshima, Japan, and died on March 14, 2026, in a Hiroshima hospital, just 15 days before what would have been his 89th birthday.
He’s best known internationally for two things: a tearful hug with U.S. President Barack Obama at the Hiroshima Peace Memorial Park in 2016, and over four decades of dogged, self-funded historical research into the fate of 12 American prisoners of war who died in the atomic bombing of Hiroshima.
Early Life in Hiroshima — A City About to Change Forever
Hiroshima in the late 1930s was a bustling military and industrial city on the southwestern coast of Japan’s main island, Honshu. It was also the city where, on March 29, 1937, a baby boy was born who would one day become one of its most important voices.
Shigeaki grew up in the city during the most turbulent years of the 20th century. World War II was already reshaping the world around him, but for a child in Hiroshima, life carried on — until it didn’t.
A Childhood Cut Short: August 6, 1945
It was 8:15 in the morning. Eight-year-old Shigeaki Mori was walking across a bridge near his school when the sky turned white.
The United States Army Air Forces had just dropped “Little Boy” — a uranium bomb — from a B-29 Superfortress called Enola Gay. The bomb detonated about 600 meters above the city, roughly 400 meters from what is now called the hypocenter. The explosion generated temperatures that reached 3,000 to 4,000 degrees Celsius at ground level and a shockwave that could be felt miles away.
Mori was approximately 2.5 kilometers (about a mile and a half) from the epicenter. The blast wave hit him and threw him off the bridge and into the river below.
What He Saw on That Bridge — An 8-Year-Old’s Memory of the Blast
He survived the fall. He crawled out of the water. And then he saw things no child should ever see.
“I crawled up out of the water and saw a woman tottering toward me,” Mori later recalled. “Blood was everywhere on her body, and internal organs hung from her abdomen. While holding them, she asked me where she could find a hospital. Crying, I ran away, leaving her alone.”
He kept moving through the city’s shattered streets, trying to get home. “People who were still alive were collapsed all around me,” he said. “I escaped by stamping on their faces and heads. I heard screams from a broken down house. But I ran away as I was still a child with no power to help.”
Those memories stayed with him for the rest of his life. He once said he still hated the glow of the setting sun — it reminded him of the orange fire that consumed Hiroshima that day.
Growing Up as a Hibakusha in Post-War Japan
The word hibakusha (被爆者) translates literally as “bomb-affected person.” It’s the Japanese term for survivors of the atomic bombings of Hiroshima and Nagasaki. Being a hibakusha in post-war Japan was complicated — there was pride in survival, but also stigma, fear of radiation, and a pressure to stay quiet about one’s experiences.
Mori grew up carrying all of that. He became a historian — a man who believed that the worst thing you could do with terrible history was forget it. He eventually got a job at a company in Hiroshima, where he worked as a regular employee for much of his life. But what he did with his evenings and weekends over four decades is what makes him extraordinary.
The Discovery That Changed Everything — American POWs in Hiroshima
A Little-Known Historical Fact
In the 1970s, while doing historical research into the bombing, Mori came across something he couldn’t quite believe. In photographs and documents from that devastating morning in August 1945, there were references to American servicemen — U.S. military prisoners of war — who had been held in Hiroshima when the bomb fell.
It was a fact almost nobody knew. American prisoners of war had been killed by an American bomb. The bomb their own country dropped.
Mori, a survivor of that very bomb, felt something shift inside him. He couldn’t look away.
Who Were the 12 American POWs?
The 12 American prisoners of war held in Hiroshima at the time of the bombing came from the crews of several U.S. military aircraft shot down during raids on targets in western Japan in late July 1945 — just days before the bomb fell.
They were young men. Sons. Brothers. Fathers in some cases. They had flown across the Pacific to fight a war, been captured, and were being held as prisoners. Ten of them died on August 6, 1945 — the day of the bombing. Two survived the initial blast but died from radiation poisoning in the following days, their bodies giving out after being exposed to levels of radiation that medicine at the time had no answer for.
Their families back in the United States received no clear word of what had happened to them. For decades, their deaths were unacknowledged in any official record.
Among those whose stories Mori would come to know most deeply were Normand Brissette and Ralph Neal, two of the American POW casualties whose stories feature prominently in the Paper Lanterns documentary.
The Lonesome Lady and the Taloa — How They Ended Up in Hiroshima
The men came from the crews of multiple aircraft, most notably two B-24 Liberator bombers: the Lonesome Lady and the Taloa. Both were shot down during air raids on the Japanese naval base at Kure in late July 1945.
Not all crew members survived being shot down. But those who did were captured and transported to Hiroshima — the nearest large city — where they were held as prisoners of war in the city’s military police headquarters.
Thomas “Tom” Cartwright was the first lieutenant who piloted the Lonesome Lady. His fate would take a dramatically different turn from his crewmates. Separated from the others and sent to Tokyo for interrogation, Cartwright survived the war. The city of Hiroshima — and everyone held in it — was obliterated without him.
Over the following years, Cartwright and Mori would develop one of the most unlikely and moving friendships of the 20th century.
The Chugoku Military Police Headquarters: 400 Meters from the Hypocenter
The 12 American POWs were held at the Chugoku Military Police Headquarters. When you look at a map of Hiroshima’s blast zone, the location is staggering. The headquarters sat approximately 400 meters from the hypocenter — barely a quarter of a mile from where the bomb detonated above the city.
There was, realistically, no surviving something like that.
Mori’s 40-Year Mission: Research, Rejection, and Resilience
Doing It All While Holding a Full-Time Job
Here’s what makes Mori’s story so remarkable: he wasn’t a funded academic. He didn’t have a university budget or a research team. He was a company employee, working a regular job in Hiroshima. His research into the American POWs was done on his own time, with his own money, driven entirely by his own conscience.
For over 40 years, he pored over thousands of wartime documents — both American and Japanese — in a language he could barely read at first. He made cold calls to strangers in the United States. He wrote letters to families he’d never met, families who had spent decades not knowing how or where their sons had died.
The Challenges He Faced — Cold Calls, Cold Shoulders, and Red Tape
It wasn’t easy, and it wasn’t always appreciated. Many of his fellow Japanese couldn’t understand why he’d dedicate his life to honoring the men whose country had dropped the bomb. He faced quiet criticism and bewilderment from people around him.
On the American side, tracking down families across a country he’d never visited — before the internet, without speaking English — meant navigating bureaucracy, language barriers, and the sheer passage of time. Some family members had already died. Others had lost track of what happened. Mori pressed on anyway.
He even worked extra jobs on the side to fund a ceremonial plaque to honor the POWs — paying out of his own pocket for something nobody asked him to do, for people from a country that had bombed his city.
Getting the Names Into Japan’s Official Atomic Bomb Registry
One of Mori’s central goals was to get the 12 American POWs officially recognized as victims of the atomic bombing. Japan maintained — and still maintains — an official registry of atomic bomb victims at the Hiroshima Peace Memorial Hall. For decades, no American names appeared in it.
Mori changed that. Through his persistence, the 12 American servicemen’s names were eventually added to that registry. Today, you can visit the Hiroshima Peace Memorial and look up each of the men on an interactive kiosk — see their name, a photo if one exists, and a brief biography. That exists because of Shigeaki Mori.
The Friendship With Tom Cartwright — A 20-Year Pen-Pal Relationship
One of the most quietly beautiful threads in Mori’s story is his relationship with Tom Cartwright, the Lonesome Lady‘s pilot. The man who survived only because he’d been sent away from Hiroshima.
After Mori tracked Cartwright down, the two became friends. Over more than 20 years, they exchanged letters — possibly a hundred of them, by Mori’s own count. In 2004, Mori translated Cartwright’s own book — A Date with the Lonesome Lady: A Hiroshima POW Returns — into Japanese, so that Japanese readers could hear Cartwright’s account of what happened to the men in his crew.
When Cartwright passed away in 2014 at the age of 90, Mori received an invitation to his remembrance ceremony in Moab, Utah. He desperately wanted to go. He wasn’t able to make the trip. It was a grief he carried.
The Book That Told the World — The Secret of the American POWs Killed by the Atomic Bomb
Publication in Japanese (2008) and the Kikuchi Kan Prize
In 2008, after decades of research, Mori finally published his findings. The book — Genbaku de shinda Beihei hishi (原爆で死んだ米兵秘史), which translates as A Secret History of U.S. Servicemembers Who Died in the Atomic Bomb — was published in Japanese by Kojinsha.
It won the prestigious Kikuchi Kan Prize, one of Japan’s most respected literary awards, given to works of remarkable cultural and social significance. The recognition mattered to Mori, but it wasn’t the point. Getting the story out was the point.
The English Translation and Its Free Online Version
With the help of his childhood friend Paul Satoh — a Professor Emeritus at Michigan State University — and with later editorial contributions from Yukako Ibuki (a retired teacher and peace activist) and Mark Shavers, Mori arranged for the book to be translated into English and published online, entirely free of charge, at hiroshima-pows.org.
This was a deliberate choice. Mori didn’t want money. He wanted people to know.
Paper Lanterns — The Documentary That Brought Mori to the World Stage
How an American Filmmaker Found Mori’s Story
American filmmaker Barry Frechette had a family connection to the story. His uncle had been a childhood friend of one of the 12 American POWs. A family scrapbook in 2013 or 2014 sparked his curiosity. When Frechette dug into who had researched these men — who had told their story — he found Mori.
He got on a plane to Japan.
The resulting documentary, Paper Lanterns, was co-directed by Frechette and Max Esposito. It tells the story of Mori’s decades of research, the American families he found, and the emotional reunions that resulted from his work.
What the Film Covers
Paper Lanterns centers on the stories of Normand Brissette and Ralph Neal, two of the 12 POWs. It weaves together Mori’s research journey with interviews from surviving family members, and follows Mori himself as he meets some of those families in person — closing loops that had been open for seven decades.
Festival Recognition and Emotional Audience Reactions
The film was an official selection at the 2016 Hiroshima International Film Festival, the 2016 United Nations Association Film Festival, and the 2016 Independent Film Festival of Boston, among others. It screened at the United Nations in New York City and at the Museum of Fine Arts in Boston.
Co-director Max Esposito described audiences who sat in total silence, with audible sniffles. “Every audience member that sees it is kind of taken on this emotional roller-coaster,” he said. The film’s Japanese reception was particularly striking — national and local film crews in Japan ended up filming the filmmakers filming Mori.
The Hug Heard Around the World — Obama Visits Hiroshima (2016)
Why Obama’s Visit Was Historically Controversial
When it was announced that President Barack Obama would visit Hiroshima’s Peace Memorial Park in May 2016, it set off a fierce debate in Washington. Many advisers told him not to go. For an American president to set foot in Hiroshima, they feared, would be read as an apology for dropping the atomic bomb — a political and diplomatic minefield.
Obama went anyway.
He became the first sitting U.S. president to visit Hiroshima’s Peace Memorial Park. It was May 27, 2016.
Obama’s Speech: “A Dozen Americans Held Prisoner”
In his address at the park, Obama spoke of the tens of thousands of lives lost. And he specifically acknowledged — in the speech of a U.S. president, in Hiroshima — that among the dead were American servicemen.
“A dozen Americans held prisoner,” he said.
It was a direct acknowledgment of what Mori had spent 40 years trying to get the world to recognize. Obama had been briefed on Mori’s work. He knew the story.
The Moment of the Embrace — In Mori’s Own Words
After the speech, Obama made his way to Mori. An elderly man, overwhelmed with emotion, barely containing what was clearly decades of relief.
“The president gestured as if he was going to give me a hug, so we hugged,” Mori told reporters afterward.
That was Mori. No drama. No performance. Just a man who’d waited a very long time for this moment, and who described it with the same quiet restraint he’d approached everything in his life.
Why That Hug Mattered More Than People Realize
The image of Obama embracing Mori at the Hiroshima Peace Memorial Park became one of the defining photographs of Obama’s presidency. But to reduce it to a photo op is to miss everything.
That hug was the U.S. government — embodied in its president — acknowledging not just the Japanese victims of the bomb, but the American ones. It was the validation of 40 years of solo work by a man with no institutional backing. And perhaps most powerfully, it was a former enemy embracing a survivor, with neither apology nor accusation — just recognition that both sides had lost sons.
“When the President hugged me, he was hugging all the people who lost their lives in Hiroshima and Nagasaki,” Mori said later. “It was a message of the preciousness of peace.”
Mori’s First Trip to America (2018) — Closing a 70-Year Circle
Boston, the UN, and the Families of the Fallen
In May 2018, at the age of 81, Shigeaki Mori made his first-ever trip to the United States. A GoFundMe campaign called “Bring Mr. Mori to the USA” — organized by filmmaker Barry Frechette — helped make it happen.
He traveled to Boston to visit the grave of one of the fallen American servicemen, accompanied by that man’s relatives. He attended a screening of Paper Lanterns at the United Nations Headquarters in New York City.
Think about that for a moment. A Japanese man who survived the bomb his country’s enemy dropped. Traveling, for the first time in his 81 years, to that enemy’s country — to pay his respects at a grave, and to speak of peace at the United Nations.
What He Said About Peace at the United Nations
Throughout his public appearances, Mori returned to one theme above all others: that his 40 years of research had never really been about nationality. “The research I spent more than 40 years was not about people from the enemy country,” he said. “It was about human beings.”
Personal Life — Wife, Family, and the Man Behind the Mission
Kayoko Mori — His Wife and Fellow Hibakusha
Shigeaki Mori’s wife, Kayoko, was also a hibakusha — an atomic bomb survivor, though she was so young at the time that she retained few memories of it. The two built a life together in Hiroshima, raising two children.
Those who met Kayoko often described her as warm and gracious. At screenings of Paper Lanterns in 2018, she would stand at the theatre exit after the film and hand each audience member a hand-folded paper crane — the traditional Japanese symbol of peace and healing.
A Quiet Life in Hiroshima, Driven by Extraordinary Purpose
By any external measure, Shigeaki Mori lived a modest life. He worked a company job. He lived in Hiroshima with his wife. He had two children. But in the margins of that ordinary life, he did something extraordinary: he refused to let the dead be anonymous. He spent his own money, used his own time, and poured his own heart into making sure that 12 young American men — men who might otherwise have vanished completely from history — were remembered.
Death, Legacy, and His Final Warning to the World
Shigeaki Mori’s Death on March 14, 2026
Shigeaki Mori died in Hiroshima on March 14, 2026, at the age of 88. Wikipedia He passed away at a Hiroshima hospital. His death was confirmed by the editors of the English translation of his book on their website, hiroshima-pows.org.
His passing came just 15 days before what would have been his 89th birthday — the same birthday he’d been celebrating in the same city, in the shadow of the same history, his entire life.
The editors of hiroshima-pows.org marked the occasion with words that captured everything: “More than 80 years after walking into and forever facing the nuclear holocaust in Hiroshima that predestined his profoundly meaningful life, Mori-san completed his childhood journey with a final, peaceful crossing of the bridge.”
His Last Warning: The World Is on the Brink Again
Tributes poured in since Mori died, with many noting that in the days before his death, he had warned that the world seems on the brink of another nuclear catastrophe. South China Morning Post It was a warning he’d spent his life working against — not through protest or politics, but through the simple, radical act of telling the truth about what nuclear weapons do to human beings.
Tributes and What He Leaves Behind
Shigeaki Mori leaves behind a wife, two children, a published book, a documentary film, 12 names on a peace registry that almost didn’t include them, and a lesson that crosses every border: that compassion doesn’t stop at nationality.
Barry Frechette, who directed Paper Lanterns, perhaps said it best: “They were sons, brothers, husbands and fathers. And they deserved to be treated as such. No matter what uniform they wore. That is Shigeaki Mori’s legacy.”
FAQ — Everything You Wanted to Know About Shigeaki Mori
Who was Shigeaki Mori? Shigeaki Mori was a Japanese amateur historian and atomic bomb survivor from Hiroshima. He’s best known for his 40+ years of research into 12 American prisoners of war who were killed in the 1945 atomic bombing of Hiroshima, and for his emotional embrace with President Barack Obama at the Hiroshima Peace Memorial Park in 2016.
How did Shigeaki Mori survive the atomic bomb? Mori was 8 years old on August 6, 1945, and was approximately 2.5 kilometers (1.5 miles) from the bomb’s hypocenter. He was walking across a bridge when the blast wave threw him into the river below. He survived, crawled out of the water, and witnessed the aftermath of the explosion as he made his way through the destroyed city.
Why did Obama hug Shigeaki Mori? During Obama’s historic May 2016 visit to Hiroshima — the first by a sitting U.S. president — he met Mori after his speech at the Peace Memorial Park. Obama recognized Mori for his decades-long effort to identify and honor 12 American POWs killed in the bombing, and to locate their families in the U.S. The moment of embrace became one of the most iconic images of Obama’s presidency.
How many American POWs died in Hiroshima? Twelve American prisoners of war died as a result of the atomic bombing of Hiroshima on August 6, 1945. Ten died on the day of the bombing. Two survived the initial blast but died from radiation poisoning within the following two weeks. They were held at the Chugoku Military Police Headquarters, approximately 400 meters from the hypocenter.
What book did Shigeaki Mori write? Mori wrote Genbaku de shinda Beihei hishi (A Secret History of U.S. Servicemembers Who Died in the Atomic Bomb), published in Japanese in 2008. The book won the Kikuchi Kan Prize, one of Japan’s most prestigious literary awards. An English translation is available free of charge online at hiroshima-pows.org.
What is the Paper Lanterns documentary? Paper Lanterns is a 2016 documentary film co-directed by Barry Frechette and Max Esposito. It tells the story of Mori’s decades-long research, the 12 American POWs, their families, and the emotional reunions Mori helped make possible. The film was an official selection at the Hiroshima International Film Festival, the UN Association Film Festival, and the Independent Film Festival of Boston.
What is a hibakusha? A hibakusha (被爆者) is the Japanese term for a survivor of the atomic bombings of Hiroshima or Nagasaki in August 1945. The word literally means “bomb-affected person.” Hibakusha faced not only the physical effects of radiation but also significant social stigma in post-war Japan. Shigeaki Mori and his wife Kayoko were both hibakusha.
When did Shigeaki Mori die? Shigeaki Mori died on March 14, 2026, at a hospital in Hiroshima, Japan. He was 88 years old. He died just 15 days before what would have been his 89th birthday.