View From Tokyo: Has Iran War Changed Confidence in the US?

Why It Matters

A decline in confidence could reshape the U.S.–Japan alliance and affect broader Indo‑Pacific security cooperation, signaling potential friction in multilateral crisis responses.

Key Takeaways

• Japanese polls: 75‑86% oppose US‑Israel attacks on Iran.
• Rising oil, electricity costs and yen weakness hit Japan’s economy.
• Researchers question US‑Japan alliance amid US missile redeployments.
• Japan skipped G7 “multinational mission” statement on Strait of Hormuz.
• Trust in US institutions persists despite criticism of Trump’s tactics.

Pulse Analysis

The United States’ unilateral strike on Iranian targets has sparked a cascade of geopolitical reverberations far beyond the Middle East. In the Indo‑Pacific, the conflict intersects with already fragile supply chains, prompting policymakers to reassess the reliability of U.S. leadership in upholding the international order. While the war has intensified energy price volatility and contributed to global stagflation, its most immediate impact is the erosion of soft power, as allies question the strategic rationale behind a campaign lacking clear objectives, legal consensus, or multilateral backing.

In Japan, public sentiment has turned sharply against the operation, with recent polls indicating that up to 86% of respondents do not support the U.S. and Israeli attacks. The economic fallout—higher crude‑oil and electricity costs, a depreciating yen, and falling equity markets—has amplified domestic criticism of Washington’s approach. Academic circles are now debating whether the traditional U.S.–Japan security pact can endure a scenario where American forces are redeployed from East Asia to the Middle East, potentially creating a deterrence vacuum against North Korea and China. Japan’s decision to abstain from the G7 statement on the Strait of Hormuz underscores a cautious diplomatic posture aimed at preserving autonomy while still valuing the strategic shield provided by the U.S. Seventh Fleet.

Looking ahead, the durability of the alliance will hinge on Washington’s ability to separate its domestic political calculus from core security commitments in the region. If the Trump administration continues to prioritize unilateral actions that jeopardize economic stability and maritime freedom, Japanese policymakers may seek greater diversification of security partnerships, including deeper cooperation with European allies or regional powers. Conversely, a recalibrated U.S. strategy that re‑affirms multilateral norms could restore confidence and reinforce the Indo‑Pacific’s collective defense architecture. The trajectory of this confidence gap will be a key barometer for future U.S. influence in the Pacific.