There are some historical footnotes so grotesque, so infused with an almost cinematic evil, that you find yourself hoping they’ve been exaggerated—warped by time, lost in translation, or distorted by political motives. But then you look deeper. You follow the primary sources. You listen to the testimony. And suddenly, you’re no longer dealing with myth or rumor. You’re staring straight into the abyss of what humans are capable of under the right (or wrong) conditions.
This is one of those stories.
In 1937, during the brutal Japanese invasion of China, two junior officers of the Imperial Japanese Army—Toshiaki Mukai and Tsuyoshi Noda—found themselves embroiled in what has since been dubbed the “Hundred Man Killing Contest.” According to contemporaneous reports from Japanese newspapers, the two officers competed to see who could kill 100 people first… with a sword. And yes, you heard that correctly. Not with a gun. Not with artillery. With a sword. In hand-to-hand combat. One slice, one human being. Then another. And another.
What was framed as a “friendly” contest—reported with the same tone as a sporting match, no less—was actually a ritualized, bureaucratically recorded descent into homicidal madness.
But the truly harrowing part? That’s just the surface.
The Normalization of Atrocity
The contest took place during the lead-up to one of the 20th century’s worst war crimes: the Nanjing Massacre, where upward of 200,000 civilians were slaughtered. But even within that context—amid the rape, the pillage, the unconstrained brutality—the idea of a game between two officers about who could out-kill the other stands out for its sheer sociopathic detachment.
We’re not talking about decisions made in the fog of war, under duress, in the middle of a chaotic firefight. We’re talking about systematic, premeditated executions of prisoners of war—people tied up, defenseless, kneeling. And two men walking from one to the next, cutting them down like livestock. Keeping score.
And here’s the chilling part: It wasn’t done in secret. It wasn’t a war crime someone tried to cover up. It was reported in the press—openly, publicly, even enthusiastically. Newspapers in Japan followed the kill counts like sports stats. “Lt. Mukai: 89 kills. Lt. Noda: 78 kills. Still time to catch up.” This wasn’t horror hidden in shadows. It was horror on the front page.
What Kind of System Produces This?
Let’s pause. Because stories like this don’t just happen in isolation.
Mukai and Noda weren’t just two bad apples. They were products of a military ethos that had already dehumanized the enemy to the point of abstraction. The Imperial Japanese military, at that point in history, had adopted an ultranationalist ideology that saw surrender as dishonorable, weakness as contemptible, and the enemy as less than human.
But this goes beyond ideology. This goes to something deeper and darker in the human psyche. Because history is littered with examples of this kind of dehumanization—of people turning the act of killing into a competition, a tally, a game.
From the Mongols building pyramids of skulls, to the Einsatzgruppen counting bullets per Jew, to the Khmer Rouge forcing children to beat teachers to death with farming tools—it’s a recurring horror. And every time, it begins the same way: not with violence, but with detachment. With the ability to see the other not as a person, but as an object. An obstacle. A statistic.
Mukai and Noda weren’t just killing men. They were chasing a number.
Truth, Trial, and Denial
Noda, center, and Mukai, right, during their trial for war crimes in China. Gunkichi Tanaka is on the left.
After the war, both officers were tried and executed by the Chinese War Crimes Tribunal. But not before their actions—and the newspaper coverage surrounding them—sparked an international debate.
Some modern Japanese nationalists have tried to claim the contest was fictional or exaggerated. That it was propaganda. That Mukai and Noda were pawns in a postwar vengeance campaign. But the trial transcripts are clear. The confessions were recorded. The testimonies of Chinese survivors corroborate what the Japanese papers once proudly displayed.
It’s one thing to doubt a number. Was it really 100? Was it 120? But the act itself—the use of POWs for sword practice, the twisted contest mentality, the casual evil of it all—has never been seriously refuted by historians outside of fringe revisionism.
It happened. And it leaves behind a haunting legacy: that the line between soldier and butcher, between man and monster, is terrifyingly thin when moral frameworks are eroded by war, ideology, and dehumanization.
A Terrifying Mirror
The “Hundred Man Killing Contest” isn’t just a story about two men losing their humanity. It’s a cautionary tale about how entire societies can lose the plot—how evil can be normalized, celebrated, and even reported as newsworthy entertainment. And how quickly we can go from fighting enemies to harvesting bodies for points.
The men in this story weren’t demons. That’s the terrifying part. They were ordinary, by-the-book military officers who followed orders and did what their system allowed—even encouraged—them to do.
So, the real question isn’t “How could this happen?”
The real question is: Under the right conditions, how could it not?