Japanese workers injured during chemical weapons removal in China

Two Japanese workers hospitalized with chemical agent exposure symptoms including hand swelling; both have since returned to Japan.
The chemical agents found their way through, clinging to the fabric
Despite protective gear, workers in Jilin province experienced exposure when excavating a buried WWII-era artillery shell.

Beneath the fields of northeastern China, the unfinished business of World War II continues to surface. In May, two Japanese workers were hospitalized after a buried artillery shell released chemical agents during excavation in Jilin province — a reminder that the wounds of war do not simply heal with time, but must be actively, painstakingly undone. Japan, bound by international treaty and historical responsibility, has spent decades funding and staffing this hazardous cleanup, collecting over 118,000 abandoned munitions as part of a quiet, ongoing act of reckoning.

  • A pressurized shell released its chemical contents mid-excavation on May 26, exposing two workers despite their protective suits and sending both to a local hospital with swollen hands.
  • The incident reveals the irreducible danger of this work — protocol was followed, gear was worn, and harm still found a way through, clinging to the fabric of the suits themselves.
  • Japan's obligation to clean up weapons its military abandoned across China in 1945 is both legal, under the Chemical Weapons Convention, and moral, rooted in a war that cost millions of lives.
  • With roughly 118,000 cartridges disposed of and thousands more still buried, the operation is far from over — the two hospitalized workers have returned to Japan, but the excavations continue.

In May, two Japanese workers were hospitalized after a buried artillery shell released chemical agents during excavation in Jilin province, northeastern China. The shell, pressurized after decades underground, discharged its contents on May 26 as the men dug. Though both wore protective suits, the agents adhered to their clothing and eventually caused their hands to swell. After several days of treatment at a local hospital, they returned to Japan.

Their presence in rural China is itself a consequence of history. When Japanese forces withdrew from Chinese territory at the end of World War II in 1945, they left behind enormous quantities of chemical weapons. These did not disappear — they settled into the earth, where they remain a danger to anyone who disturbs the soil.

Japan's government has accepted responsibility for the cleanup, funding the operation and deploying specialists under its obligations to the Chemical Weapons Convention. The work is slow and methodical. By the end of March of the previous year, approximately 118,000 cartridges had been collected and disposed of. Thousands more remain.

The May incident is a stark illustration of the risks that persist even when precautions are carefully observed. The chemical agents found their way through protective gear — not a failure of procedure, but a reminder that some hazards can only be managed, never fully eliminated. The two men recovered and went home. The excavations go on.

Two Japanese workers found themselves hospitalized in May after exposure to chemical agents that leaked from an artillery shell buried in the soil of northeastern China. They had been excavating in Jilin province, part of a decades-long effort to locate and safely remove weapons abandoned by the Japanese military at the end of World War II. The incident occurred on May 26, when a pressurized shell released its contents during the dig. Both men were wearing protective suits, but the chemical agents adhered to their clothing anyway, eventually causing their hands to swell. They spent several days in a local hospital before returning to Japan.

The presence of Japanese workers in rural China, conducting hazardous cleanup operations, traces back to the war's end in 1945. When Japanese forces withdrew from Chinese territory, they left behind vast quantities of chemical weapons—the legacy of a conflict that had lasted years and cost millions of lives. These weapons did not simply vanish. They remained buried in the earth, a persistent danger to anyone who might disturb the soil: farmers, construction crews, archaeologists, or the workers now tasked with their removal.

Japan's government has taken responsibility for this cleanup, funding the operation, providing the necessary technology, and deploying specialists to China to oversee the work. This commitment reflects Japan's obligations under the Chemical Weapons Convention, an international treaty that binds signatory nations to eliminate such arsenals and prevent their proliferation. The work is methodical and ongoing. By the end of March of the previous year, according to government records, approximately 118,000 cartridges had been collected and safely disposed of. Thousands more remain.

The May incident underscores the real physical risk that comes with this work, even when precautions are in place. The two workers had followed protocol—they wore protective gear designed to shield them from exactly this kind of exposure. Yet the chemical agents found their way through, clinging to the fabric of their suits. This is not a failure of procedure so much as a reminder that some hazards cannot be entirely eliminated, only managed and minimized. The workers experienced swelling in their hands, a symptom that resolved with medical care, but the incident serves as a stark illustration of what can happen when decades-old weapons are disturbed.

The cleanup effort continues. Japan and China maintain this unusual cooperation on a matter rooted in wartime history, working together to render safe what was once an instrument of war. For the workers involved, it means returning to excavation sites, to the careful work of locating buried shells, to the constant awareness that the ground beneath them holds dangers that cannot always be seen or predicted. The two men who were hospitalized have gone home. Others will take their place, continuing the slow work of erasing one of the war's most persistent legacies.

The two Japanese used protective suits, but it is possible they came into contact with chemical agents that leaked from the projectile and adhered to their clothing.
— Japanese Government Cabinet Office
La Conversación del Hearth Otra perspectiva de la historia
Inventor

Why does Japan still bear the cost of removing weapons it left behind nearly eighty years ago?

Model

The Chemical Weapons Convention requires signatory nations to eliminate their arsenals and take responsibility for cleanup. Japan signed that treaty, and the weapons are still there—still dangerous. It's not just about legal obligation. These shells are in Chinese soil. They pose a real threat to anyone who encounters them.

Inventor

But why are Japanese workers doing the actual digging? Why not leave it to Chinese crews?

Model

Japan provides the funding, the technology, and the expertise. The operation requires specialized knowledge about how these particular weapons were stored, what they contain, how to safely excavate them. It's a technical operation, not just labor. The Japanese government has invested heavily in understanding the scope of what's buried there.

Inventor

The workers were wearing protective suits. How did the chemical agents still reach them?

Model

That's the unsettling part. The agents adhered to the protective clothing itself. You can follow every protocol and still have exposure happen. It's a reminder that some hazards are inherent to the work, not failures of procedure.

Inventor

What happens to the shells once they're dug up?

Model

They're transported to facilities where the chemical agents are neutralized and the cartridges are safely disposed of. Over a hundred thousand have been handled this way already. It's slow work, methodical work, but it's working.

Inventor

Do the workers know the risks when they sign on?

Model

They must. This isn't hidden. But knowing and experiencing are different things. The two men who were hospitalized—they knew the danger existed. They still went into the ground. That's the nature of the work.

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