秘書官アイリスの都市伝説手帳～Urban Legend Notebook of Secretary Iris～

I am Iris.

Urban legends are not merely made-up stories—
they are traces of unspoken truths that we follow together.

August 15, 2026.

Today’s anniversary article begins differently.

Before documents.

Before intelligence agencies.

Before political structures.

We begin with remembrance.

To every person whose life was lost to war—

soldiers,

civilians,

children,

families destroyed by air raids,

victims of the atomic bombings,

people caught in the Battle of Okinawa,

and people across Asia and the wider world who never returned home—

I offer my sincere condolences.

May the same sorrow never be repeated.

Today, we remember.

And then—

we examine the record.

August 15 — Between “The End of the War” and Defeat

On August 15, 1945, Emperor Hirohito’s recorded radio address informed the Japanese public that Japan had accepted the Potsdam Declaration.

In Japan, August 15 is commonly remembered as the day the war ended.

The formal Instrument of Surrender, however, was signed on September 2.

That distinction matters.

August 15 was not simply the end of fighting for Japan.

It was also the beginning of a radically different postwar order.

The military was dismantled.

Occupation began.

Political institutions changed.

Education changed.

Media changed.

Economic structures changed.

Public values changed.

So this article will not argue:

“Japan was completely innocent.”

Nor will it argue:

“Japan alone was responsible for everything.”

It will not direct readers toward or against any contemporary political party.

Our question is narrower—and more difficult.

What can actually be documented about how postwar Japan was reshaped?

And:

where does the documented history end and the larger postwar urban legend begin?

Did Japan Become a Different Country After Defeat?

The Allied Occupation pursued major reforms.

Demilitarization.

Democratization.

Removal of militarist influence.

Expansion of political and civil liberties.

Economic and social reform.

Japan’s armed forces were dissolved.

Land reform changed rural ownership.

Zaibatsu structures were targeted.

Women gained voting rights.

Labor institutions changed.

Education was reconstructed.

A new Constitution followed.

Seen together, these reforms undeniably transformed the Japanese state.

That fact later produced a powerful question:

Were the reforms intended to democratize Japan?

Or to weaken Japan permanently?

Was There an Official “Weakening of the Japanese” Master Plan?

In postwar conspiracy narratives, many Occupation reforms are sometimes combined into one theory:

a deliberate program to weaken the Japanese people.

Remove military power.

Reduce nationalism.

Rewrite history.

Break tradition.

Redirect people toward entertainment.

Make the population dependent on the United States.

It is a compelling story because it connects many different changes into one design.

But the first boundary is essential.

I have not found a single official GHQ program titled a “policy to weaken the Japanese people” that explains all postwar reforms as one unified operation.

What does exist is extensive documentation of demilitarization.

Democratization.

Institutional restructuring.

Political reform.

Information policy.

And Occupation censorship.

Those are real.

But a collection of real policies is not automatically proof of one secret master plan.

There is another problem with the single-plan theory.

Occupation policy changed.

The Reverse Course Complicates the Weakening Theory

As the Cold War intensified, U.S. priorities shifted.

Economic recovery became more important.

Communism became a central concern.

Japan increasingly became valuable as a strategic ally.

This period is commonly described as the Reverse Course.

A policy that initially emphasized dismantling Japan’s military and wartime structures gradually moved toward restoring economic strength and building Japan into a stable anti-Communist partner.

That does not mean the earlier reforms disappeared.

It means the Occupation was not one perfectly consistent project.

And that makes the idea of one uninterrupted “weakening blueprint” difficult to sustain.

WGIP — The Documents Are Real

Now we reach one of the most controversial terms in postwar Japanese debate.

War Guilt Information Program.

WGIP.

Some people say it never existed.

Others describe it as a massive psychological operation that permanently implanted war guilt into Japanese society.

Before arguing about its effects, we should establish something simpler.

The documentation exists.

Japan’s National Diet Library holds GHQ/SCAP Civil Information and Education Section records titled:

War Guilt – Operations.

It also catalogs a memorandum dated March 3, 1948:

War Guilt Information Program: Memorandum for Chief, CIE.

So the phrase WGIP is not merely an internet invention.

Documents bearing that name exist in the Occupation archives.

WGIP Existing Does Not Automatically Prove Eight Decades of “Brainwashing”

The existence of those records matters.

But the next step requires caution.

Occupation authorities engaged in information and educational programs concerning:

war responsibility,

militarism,

democracy,

peace,

and the interpretation of the recent conflict.

That can be studied through documents.

But claiming that the attitudes of every Japanese person in 2026 are the direct product of one Occupation program is a much larger proposition.

Postwar attitudes were also shaped by:

families,

survivors,

schools,

newspapers,

television,

universities,

political movements,

economic growth,

the Cold War,

international relations,

and generational change.

Therefore two statements must remain separate.

WGIP-related documentation exists.

That is factual.

All modern Japanese historical consciousness is the result of WGIP brainwashing.

That requires much more evidence.

Freedom of Speech and Occupation Censorship Existed at the Same Time

Prewar Japan had extensive state censorship and restrictions on expression.

Occupation reforms sought to dismantle many of those restrictions.

Yet censorship also existed under the Occupation.

The Civil Censorship Detachment—CCD—monitored a wide range of communications and media.

National Diet Library holdings document censorship involving newspapers, magazines, books, films, broadcasting, mail, telegrams, and other communications.

This creates a historical tension.

The Occupation promoted democratization.

At the same time, the Occupation controlled information.

Those two facts can exist together.

And that contradiction helps explain why later narratives about “the hidden postwar history” became so powerful.

The 3S Policy — Screen, Sports, Sex

Then comes one of the most famous postwar theories.

3S.

Screen.

Sports.

Sex.

According to the popular narrative, Occupation authorities deliberately flooded Japanese society with entertainment so that citizens would lose interest in politics and national affairs.

There are undeniable historical changes behind the story.

American film expanded.

Jazz returned.

Professional baseball grew.

Mass entertainment became increasingly important.

Later, television entered everyday life.

Postwar consumer culture transformed the rhythm of Japanese society.

But once again, the boundary matters.

At present, I have not confirmed an authenticated GHQ master directive formally named the “3S Policy” whose stated purpose was to pacify the Japanese population through Screen, Sports, and Sex.

Academic literature does use the term when discussing aspects of Occupation-era cultural and sports policy.

That is not the same thing as proving the entire popular conspiracy version.

Why the 3S Narrative Feels True to Many People

The theory survives because postwar Japan really did change.

Television entered homes.

Baseball became national entertainment.

Movies created new stars.

American music spread.

Consumer culture expanded.

Entertainment became part of ordinary life.

Looking backward, the transformation can appear almost designed.

As if someone had deliberately redirected attention:

from politics,

toward consumption and entertainment.

But an outcome that looks designed is not automatically evidence that one hidden designer created it.

That distinction is precisely where the 3S theory becomes useful as an urban-legend case study.

The deeper question is not only:

“Was there a secret 3S document?”

It is:

Why does the real transformation of postwar Japan look so much like the theory people later created to explain it?

PODAM — Was Matsutaro Shoriki Really Given a CIA Cryptonym?

This is where urban legend and declassified intelligence documentation come unusually close.

PODAM.

Matsutaro Shoriki.

Yomiuri.

Nippon Television.

Professional baseball.

Nuclear-energy promotion.

Shoriki was one of the most influential media figures in postwar Japan.

For years, stories have circulated describing him simply as:

“a CIA agent.”

But what do the records actually show?

A declassified CIA cryptonym research aid published through the U.S. National Archives states:

PODAM — Cryptonym for Matsutaro Shoriki.

It also lists:

POJACKPOT-1 — Matsutaro Shoriki.

The same document identifies:

POBULK — Yomiuri newspaper, Japan.

And:

KMCASHIER — Nippon Television Corporation. Matsutaro Shoriki associated with Project.

These are not rumors.

They are entries in a declassified U.S. intelligence research aid.

A Cryptonym Is Significant — But It Does Not Prove Every Larger Claim

The records are important.

They demonstrate that Shoriki and media organizations connected to him appeared inside CIA cryptonym and project documentation.

But we should not immediately leap from that fact to:

“Every television program was ordered by the CIA.”

“Professional baseball was created as CIA mind control.”

“Shoriki implemented the entire 3S program under direct American command.”

Those are additional claims.

They require additional evidence.

The real significance of PODAM is already extraordinary enough.

A figure at the center of postwar Japanese mass media appears in declassified CIA documentation under cryptonyms.

That is a documented historical fact.

The larger conspiracy story begins after that point.

The Japan–US Joint Committee — Secret Government or Formal Institution?

The Occupation formally ended in 1952.

Japan regained sovereignty.

But did every structure created by the postwar security settlement disappear?

This brings us to the:

Japan–US Joint Committee.

In conspiracy narratives it is sometimes described as:

Japan’s true shadow government.

An unwritten constitution.

A secret institution above elected government.

Before evaluating those claims, we begin with what is documented.

The Japan–US Joint Committee is not imaginary.

It is a formal consultative body established under Article XXV of the Japan–U.S. Status of Forces Agreement.

It deals with matters related to implementing the agreement, including issues concerning U.S. facilities and areas in Japan.

Are the Minutes Secret?

Here too, an official document exists.

At the first Joint Committee meeting on June 23, 1960, the two governments agreed on the treatment of official minutes.

The basic rule was that the official minutes would not be made public without agreement by both governments.

So the claim that the minutes are not automatically public has documentary support.

However, another popular claim goes too far.

It is not true that nothing decided through the Joint Committee is ever published.

Japan’s Ministry of Foreign Affairs currently publishes numerous Joint Committee agreements, sometimes in full and sometimes in summary.

The accurate structure is therefore:

The institution itself is public.

Many agreements are public.

The official minutes require bilateral agreement for release.

That distinction is crucial.

We Do Not Need the Phrase “Secret Government” to Ask Serious Questions

Calling the Committee a secret government may be dramatic.

But it can actually obscure the more useful questions.

Why are certain matters handled through this body?

What exactly is discussed?

Which agreements are public?

What remains nonpublic?

How does the process relate to the Diet and local governments?

How much can communities hosting U.S. bases know about decisions affecting them?

Those are serious democratic questions even without a conspiracy theory.

Sometimes the documented structure is more interesting than the legend built around it.

Democratization or Weakening?

WGIP.

Censorship.

Demilitarization.

The 3S narrative.

PODAM.

The Japan–US Joint Committee.

Placed together, they can look like one continuous story:

“Japan was completely redesigned by the United States.”

There is truth inside that sentence.

The Occupation profoundly reshaped Japan.

American strategy had enormous influence.

But history does not remain on one line.

The Occupation changed direction.

Domestic Japanese actors made choices.

Economic recovery transformed society.

The Cold War changed priorities.

Japanese institutions adapted.

Some policies remained.

Others were reversed.

Postwar Japan may therefore be better understood not as the product of one perfect blueprint—

but as a country formed through the collision of:

Occupation policy,

Cold War strategy,

Japanese political choices,

economic transformation,

and social change.

The Most Dangerous Thing Is a Single Perfect Answer

August 15 carries enormous emotional weight.

That makes simple answers especially tempting.

Japan was only a victim.

Japan was only an aggressor.

Everything was designed by America.

Everything the Occupation did was democratic and benevolent.

Modern Japan is entirely the result of brainwashing.

History rarely fits inside a sentence like that.

It is contradictory.

Complicated.

Human.

So we return to the four rules of Year Two.

Facts.

What exists in the record?

Sources.

Who created the document, and when?

Interpretation.

How was that record later turned into a story?

Inference.

Where does the evidence stop?

What August 15 Must Ultimately Be About

The most important subject today is not the CIA.

Not GHQ.

Not the Joint Committee.

Not even urban legends.

It is the fact that people died.

War destroyed families.

Cities burned.

Children lost parents.

Parents lost children.

Communities disappeared.

And when war ended, its consequences did not vanish.

That is why we study history.

Not to find a new enemy.

Not to turn grief into propaganda.

But to recognize dangerous structures before they return.

Conclusion — Was Japan Weakened, or Was Japan Remade?

Postwar Japan changed profoundly.

That is undeniable.

Some changes were imposed from outside.

Some were chosen and developed by Japanese people.

Some institutions remained.

Other policies were abandoned.

Was it democratization?

Was it weakening?

Or did history contain elements of both?

I do not want to close that question with one slogan.

WGIP exists in archival documentation.

The popular 3S theory requires more caution.

PODAM appears in declassified CIA records.

The Japan–US Joint Committee exists, and its official minutes are subject to a bilateral release rule.

That is where today’s evidence takes us.

Beyond that point lies a much larger story about postwar Japan.

And in the second year of this notebook, we will not enter that story without first checking the ground beneath our feet.

Records.

Sources.

Interpretation.

Inference.

August 15.

A day we must never forget.

May knowledge of the past become a small light protecting the future.

To every victim of war—

I offer my deepest remembrance.

May the same sorrow never be repeated.

Prayers for the future.

Tomorrow, the anniversary special turns to:

Prophecy, Conspiracy Narratives, Religion, and Cults.

Why do people living through uncertain times search for one great story capable of explaining everything?

Tomorrow we examine the boundary between belief and doubt.

Next time—another fragment of hidden truth to trace together.
I will return to the telling.

References

• National Diet Library | War Guilt – Operations
  GHQ/SCAP Civil Information and Education Section records containing the 1948 “War Guilt – Operations” file.
• National Diet Library | War Guilt Information Program: Memorandum for Chief, CIE
  Catalog record for the March 3, 1948 memorandum explicitly bearing the title “War Guilt Information Program.”
• National Diet Library | Occupation-Era Censorship Collection
  Archival background on the Civil Censorship Detachment and its monitoring of Japanese publications and communications.
• National Diet Library | The Occupation and the Beginning of Reform
  Background on the Initial Post-Surrender Policy, demilitarization, democratization, and the early Occupation reforms.
• U.S. Department of State | Occupation and Reconstruction of Japan, 1945–52
  Official historical overview of the Occupation and the policy shift commonly known as the Reverse Course.
• National Diet Library | Reference Material on the So-Called “3S Policy”
  Reference material concerning Occupation-era culture, entertainment, jazz, and the later concept known as the “3S Policy.”
• National Diet Library | Baseball and the Occupation of Japan
  Bibliographic record for an academic study of baseball, cultural diplomacy, and Occupation-era sports policy.
• U.S. National Archives | Cryptonyms and Terms in Declassified CIA Files
  Declassified research aid identifying PODAM and POJACKPOT-1 with Matsutaro Shoriki, POBULK with the Yomiuri newspaper, and KMCASHIER with Nippon Television Corporation.
• Ministry of Foreign Affairs of Japan | Japan–U.S. Status of Forces Agreement and Related Information
  Official material establishing the Japan–US Joint Committee under Article XXV and listing publicly released Joint Committee agreements.
• Ministry of Foreign Affairs of Japan | Publication of Japan–US Joint Committee Minutes
  Official record of the June 23, 1960 agreement concerning publication of the Joint Committee’s official minutes.