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Iran-Israel-US War Tests Japan’s Evolving Appetite for Collective Self-Defense

By The Diplomat · 2026-03-19
Iran-Israel-US War Tests Japan’s Evolving Appetite for Collective Self-Defense
Why it matters: Japan's defense evolution and regional stability are tested by a complex Mideast conflict.
Japan faces a complex decision regarding potential Self-Defense Force deployment to Hormuz amid the Iran-Israel-US conflict, a move complicated by the war's origins in a preemptive U.S. strike and Japan's evolving defense posture. While former President Trump praises Japanese officials for their increased involvement, the broader conflict risks diverting U.S. strategic focus away from the Indo-Pacific, creating a dilemma for Tokyo.

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