Did a Streamer Who Kicked Taira no Masakado’s Head Mound Really Fall from Above a Tunnel and Die? A Philosophy of Curses

One video resurfaced across Japanese social media in August 2026.

It shows a man at the Masakado mound in central Tokyo apparently kicking or striking the monument with his foot. A post dated January 20, 2018 identified the man as a livestreamer known as Sada.

On December 29, 2023, Sada was reported within the livestreaming community to have died after falling from above the Yahagi Tunnel in Chiba. A Chiba city assembly member who visited the location also wrote that an acquaintance had died in a fall there.

A man kicks a monument to a famously vengeful spirit. Years later, he falls to his death.

Put the two facts next to each other and a plot seems to write itself: Masakado’s curse.

But philosophy should ask more than whether ghosts exist.

• What permits us to connect two events as cause and effect?
• Why does an accident become legible as moral retribution?
• Can desecration be wrong even if no supernatural punishment exists?
• What do we do to a dead person when we turn his death into a warning?

A curse may be the name of a supernatural force. It may also name the human practice of binding coincidence, morality and memory into a single story.

What is verified—and what is not

The claim contains four different propositions, and they do not have the same evidential status.

Claim	What can be verified	Limitation
A video depicting disrespectful conduct at the mound was posted in 2018	The post and clip remain identifiable	The original, unedited recording and precise filming date are unavailable
The poster identified the man as “Sada”	The attribution is visible	It is an online identification, not an official identity check
A person died after falling from above the Yahagi Tunnel on December 29, 2023	A local politician’s account and contemporary livestream-community records support the occurrence	Publicly accessible police material and major news reports do not establish the deceased’s name
The act at the mound caused the death	Not verified	Temporal order is not proof of causation

There is therefore a meaningful online record connecting the man in the old clip with the deceased streamer, but the identity chain is not fully established by public official sources. More importantly, there is no evidence that the earlier act caused the fatal fall.

It would be premature both to dismiss every element as fabricated and to declare that a curse killed him.

The most accurate formulation is this: the conduct and the fatal fall have each been recorded, the public identification has evidential limits, and supernatural causation has not been demonstrated.

This caution is not designed to mock folklore. It is required because a dead person can no longer contest the explanation others impose on his death.

Why the story returned in 2026

On August 19, 2026, a different male streamer climbed onto the Masakado monument, clung to it and screamed during a livestream. He told FNN that he had crossed the line in pursuit of views and personal validation. FNN reported that the broadcast also involved exposure, that the streaming account was suspended and that the preservation association had consulted police. The man said police were questioning him in relation to possible public indecency and disrespect toward a place of worship.

The new episode revived the older clip and the later death.

When people encounter a new transgressor, they look for what happened to the last one. Two earlier events are then edited into a warning:

Someone did this before. He later died. Something will happen to this man too.

This is not merely a factual report. It is a prophecy addressed to a violator.

Such prophecies have a social function. They communicate “do not damage this place” through a fear more vivid than legal language. Yet they also risk using a real death as exemplary punishment.

Hume: after this does not mean because of this

In An Enquiry Concerning Human Understanding, David Hume argues that our reasoning about matters of fact depends on cause and effect. Yet what we immediately observe is only that one event follows another. We do not see a hidden necessity passing from the first object into the second. Expectations such as fire producing heat arise through repeated experience.

Applied here, the sequence is simple:

1. A man is said to have disrespected the mound.
2. Nearly six years later, a streamer identified as that man died in a fall.

Nothing in that sequence alone proves that the first event produced the second.

We lack comparison and control:

• How many people have behaved disrespectfully without later suffering an unusual death?
• How many respectful visitors have nevertheless died in accidents?
• Were ordinary causes—health, balance, the design of the site and the conditions that day—examined?
• What principle selects an event almost six years earlier as the cause?

A single fit can feel overwhelming. Reliable causal inference, however, requires repetition, comparison and serious consideration of alternatives.

Hume’s point does not prove that spirits cannot exist. It is narrower and more disciplined: the available evidence does not entitle us to claim knowledge of a supernatural causal connection.

Ricoeur: coincidence becomes fate when it enters a plot

Why, then, do the two events refuse to look unrelated?

Paul Ricoeur argues that human beings understand time by configuring events as narrative. In his work on time and narrative, heterogeneous people, acts, accidents and outcomes become one intelligible whole through emplotment.

The curse story supplies a complete structure:

• a protagonist who violates a taboo;
• an offence against the dead and a sacred place;
• a delay long enough for the offender to feel safe;
• a fatal fall;
• a moral: never ridicule the sacred.

Coincidence becomes fate.

The problem is not that narrative is necessarily false. Human life is scarcely intelligible without it. The problem is that every plot selects and excludes.

The person’s physical condition, the design of the road, his relationships and all the years between the clip and the accident disappear. He remains only “the streamer who kicked the mound.” A complex life is compressed into a parable whose purpose is to prove a curse.

The story gives the death meaning. But when that meaning closes too perfectly, it can confiscate the reality of the deceased.

Durkheim: the target was not merely stone, but a social boundary

If supernatural causation is unproven, does that make any conduct at the mound permissible?

No.

In The Elementary Forms of the Religious Life, Émile Durkheim locates the elementary distinction of religion between the sacred and the profane. Sacred things are not defined by a special physical ingredient. They are set apart by a community, protected by prohibitions and placed at the centre of ritual.

Masakado’s mound is not “just a stone.”

It is a Tokyo-designated historic site and a place where a defeated and publicly displayed warrior has been commemorated for centuries. The preservation association lists cleaning, ritual observance, repair and an annual memorial ceremony among its activities. Its account of the site records the long participation of local people, nearby companies, Kanda Myojin shrine and Buddhist clergy.

To kick the monument is therefore to strike at more than material:

• the feelings of people who come to mourn;
• a local memory maintained across generations;
• a shared boundary of public conduct;
• the labour of those who preserve the site.

In this sense, public outrage, an account ban, police consultation and reputational damage can metaphorically be described as a social curse. A community has reacted to an infringement of its sacred boundary.

That is not a claim that a spirit caused an accident. It is an observable human causal process. Keeping supernatural punishment distinct from social sanction allows us to understand the real power of curse traditions without pretending to have proved the paranormal.

Goryo belief: turning a dangerous dead person into a guardian

Masakado is not simply feared as an evil ghost.

Tradition treats him as dangerous when neglected and protective when properly honoured. He is one of the deities enshrined at Kanda Myojin, whose annual observance at the mound is described as a rite to console his spirit.

This duality is characteristic of Japanese goryo belief.

Those who died unjustly, violently or with unresolved grievance are not merely erased. They are named, given a place and placed in a continuing ritual relationship with the living. Fear is answered not only by exclusion, but by renewed relations.

Japan’s National Tax Agency recounts that after the mound was damaged during post–Great Kanto Earthquake construction, the deaths of a finance minister and an engineering official helped generate rumours of a curse, followed by the erection of a memorial. The same official page explicitly says that whether the curse was real cannot be verified.

The ritual response did not wait for scientific proof. Misfortune was interpreted as a demand to repair a broken relationship with the dead.

Thus the legend does more than spread fear. In the middle of a financial district that continually rebuilds itself, it says: there is a past here that development must not flatten.

Clifford and James: may we believe without proof?

W. K. Clifford argued in The Ethics of Belief that believing without adequate evidence is ethically consequential. Beliefs do not remain sealed inside the mind; they guide speech, action and institutions.

The belief that “the streamer was killed by a curse” is not harmless.

• It can mark the deceased and his family with a verdict of deserved punishment.
• It can encourage people to await the death of the current offender.
• It can hide questions about physical safety and health.
• It can turn victims of floods or earthquakes into collateral punishment for another person’s act.

If the claim is presented publicly as fact, evidence matters.

William James, however, argues in The Will to Believe that when evidence cannot settle an unavoidable and momentous choice, there may be room for a person’s passional nature to decide.

One need not conclude, “Because no spirit has been demonstrated, I may behave however I want.” A visitor who remains uncertain can still bow, remain quiet and refrain from touching the monument.

We should distinguish two kinds of belief:

1. Private and practical belief: perhaps a curse is possible, so I will act with humility.
2. Public and factual assertion: this particular person died because a curse killed him.

The first may embody restraint before the unknown. The second imposes an explanation upon another person and therefore carries an evidential burden.

Freedom to believe is not freedom to determine someone else’s cause of death without evidence.

Is fear of punishment enough reason to show respect?

One practical argument says: we cannot know that a curse is impossible; the possible cost is enormous; avoiding desecration costs almost nothing. Caution therefore wins.

As a precautionary calculation, this is reasonable. A visitor loses nothing by staying off the monument, while damage to a historic site, distress to worshippers, legal exposure and reputational consequences are all real risks.

But calculation alone is not respect.

If fear is the only reason, then proving the absence of supernatural power would make desecration permissible. The ethic becomes a transaction: honour only those who can retaliate.

Respect for the dead means something precisely because the dead cannot answer back. It asks us not to treat the powerless, forgotten and silent as raw material for entertainment.

The strongest reason not to desecrate the mound is not that Masakado will punish us. It is this: even if he never will, another person’s death and a community’s memory must not be reduced to content.

Four dangers in saying “the curse killed him”

1. It turns the deceased into an example

The man who died had a life beyond one notorious clip. Consuming his accident as paranormal proof freezes him forever in the role of “the disrespectful streamer.”

2. It invites us to desire another death

When people tell the current offender “you are next,” the defence of a memorial site mutates into anticipation of death. It is contradictory to protect a place of mourning by wishing for someone new to mourn.

3. It hides preventable causes

A fatal fall should prompt questions about barriers, lighting, the pedestrian environment, a person’s condition and emergency response. A complete curse narrative can stop the inquiry that might prevent another accident.

4. It moralizes unrelated suffering

To call an earthquake or flood punishment for one person’s conduct turns unrelated victims into props in a moral drama. Natural disaster does not become ethically intelligible simply because a viral story gives it a villain.

Curse traditions can protect sacred places. But once they justify suffering or invite further death, their protective power has reversed into another form of harm.

Conclusion: strict with facts, humble before the sacred

The sequence is undeniably compelling: a streamer is said to have behaved disrespectfully at Masakado’s mound; years later, a streamer identified as the same person dies after falling from above a tunnel. It is understandable that many feel the fit is too perfect to be random.

But felt meaning and demonstrated causation are not the same.

Hume warns us against reading necessity into sequence. Ricoeur shows how narrative transforms scattered events into fate. Durkheim explains that anger at desecration can arise from a community’s sacred boundary, not from the physical power of a stone. Clifford makes us responsible for what we claim about the dead. James leaves room to choose humility where proof cannot settle existential belief.

The resulting position is neither simple affirmation nor dismissal:

• The evidence does not establish that a supernatural curse caused the fall.
• That does not make desecration permissible.
• Curse traditions can exert real social power by protecting places and memories.
• A real person’s death must not be consumed as deserved punishment.

A curse may not be a force that science can identify in nature. Yet an insult to the past can return through memory, institutions, the anger of others and one’s own conscience. Human communities have long used the language of curses for that return.

Maturity is neither certainty about unseen powers nor ridicule of everything unseen.

It is to be strict with evidence when stating facts, and humble before the dead and the sacred.

Perhaps that double restraint—not fear alone—is what Masakado’s mound still asks of the modern city.