The U.S. Supreme Court Ruling and Trump’s Tariff War — A Chance to Return to the Civilizational Starting Point
February 22, 2026
Tomo Nakamaru
The U.S. Supreme Court has ruled that the Trump administration’s “reciprocal tariffs” are unconstitutional.
Japan’s major newspapers have unanimously welcomed the decision and warned of the dangers of a tariff war.
Yet the significance of this ruling goes far beyond the pros and cons of trade policy.
It marks the moment when a civilization’s “last safety device” activated—
a moment when a society confronts its own institutional fatigue and halts the drift toward authoritarian excess.
At the same time, it offers Japanese civilization an invaluable opportunity to “face its own expiration date.”
1. The Supreme Court Ruling as a Civilizational “Immune Response”
The core of the ruling is straightforward:
- The International Emergency Economic Powers Act (IEEPA) allows import restrictions but not tariffs.
- Under the U.S. Constitution, tariff authority belongs exclusively to Congress.
- Therefore, Trump’s reciprocal tariffs are unconstitutional.
In other words, the judiciary has delivered a clear “NO” to the unchecked expansion of executive power.
When institutions grow fatigued, power tends to run amok.
Throughout history, civilizations in decline have shared a common pattern:
an overgrown executive branch and hollowed-out legislative and judicial institutions.
This ruling shows that American civilization has not yet lost its “institutional immune response.”
From a civilizational perspective, this is profoundly significant.
2. Trump Continues the Tariff War Through a “Back Door” — The Vicious Cycle Persists
Immediately after the Supreme Court shut down the IEEPA route,
Trump invoked Section 122 of the Trade Act to impose a flat 10% tariff on all imports—
and raised it to 15% the following day.
Section 122 is meant for exceptional circumstances:
- Sudden, sharp exchange-rate movements
- Severe deterioration in the balance of payments
It is a temporary emergency tool.
In other words, the ruling exposed the structural reality that exchange-rate shocks are being used as the legal basis for tariffs.
This is exactly what I have argued consistently since April 2, 2025:
Tariffs and exchange rates are two sides of the same coin.
Since trade is ultimately settled through currency exchange,
tariff wars inevitably become currency wars.
Trump’s tariff war shares the same structure as Abenomics’ yen-depreciation strategy.
It is part of the broader vicious cycle:
Currency war → Trade war → Hegemonic conflict → Civilizational breakdown
The Supreme Court ruling temporarily interrupted this cycle,
but Trump is now attempting to prolong it through alternative legal channels.
Civilization’s institutional fatigue has not yet been overcome.
3. What Japanese Media See — and What They Fail to See
Japan’s major newspapers share certain views on the ruling, but they also diverge sharply.
Common points
- The ruling is “natural,” “appropriate,” or “a grave decision.”
- Strong criticism of Trump’s attacks on the judiciary.
- Recognition that the tariff war destabilizes the free-trade system.
Differences
- Asahi & Mainichi: The ¥80–85 trillion Japan–U.S. investment framework has lost its foundation.
- Yomiuri: Investment should continue, separate from the tariff issue.
- Nikkei: Avoids the investment issue; focuses on restoring trade order.
In short, Japanese media recognize the legal significance of the ruling,
but fail to see the structural link between the tariff war and the ¥80 trillion investment project.
4. The ¥80 Trillion Investment Is a “Civilizational Maintenance Fee”
Japan’s ¥80 trillion investment in the United States is not mere economic cooperation.
Its essence lies in the following structure:
- Japan: Yen depreciation (Abenomics)
- U.S.: Dollar appreciation → widening trade deficit
- Japan: Massive investment to offset America’s deficit
- U.S.: Tariffs to pressure Japan and others
- Japan: Additional investment in response
This is not “mutual benefit.”
It is a civilizational cost paid to prolong a hegemonic structure.
Now that the Supreme Court ruling has shaken the very foundation of the tariff war,
the ¥80 trillion project must also be reexamined at the civilizational level.
5. What Japan Must Do — “Opposite-Vector Expenditure Switching”
Trump’s policy vector is clear:
- Tariffs to suppress imports
- A preference for a weaker dollar
- Expansion of net exports → external-demand-driven growth
Japan must move in the opposite direction:
- Abolish the consumption tax to expand domestic demand
- Raise interest rates to allow yen appreciation
- Shift from export dependence to domestic-demand-led growth
Only when these opposite vectors align
can Japan and the United States achieve a win–win equilibrium.
This is not merely economic policy.
It is civilizational redesign.
6. Facing Civilization’s Expiration Date Is the First Step Toward Renewal
The Supreme Court ruling shows that American civilization still retains
a final safeguard against institutional decay and executive overreach.
Japanese civilization must also confront its own “expired structures”:
- Dependence on yen depreciation
- Dependence on external demand
- Dependence on U.S.-bound mega-investments
Civilizations regain the possibility of change the moment they face their problems.
Civilizations that refuse to see their problems quietly decay.
Civilizations that confront them begin, slowly, to regenerate.
This ruling is a rare opportunity for both Japan and the United States
to return to the civilizational starting point.
Japan’s path is clear:
Abolish the consumption tax, allow yen appreciation through rate hikes,
and shift decisively toward domestic-demand-led growth.
This “opposite-vector equilibrium” is the only path that can save both civilizations.
Facing civilization’s expiration date is the first step toward renewal.
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