Japan’s three largest banks—MUFG, Sumitomo Mitsui, and Mizuho—have collectively boosted their foreign currency liquidity buffers to $1.25 trillion as of August 9, 2026. This move is seen as a precautionary measure anticipating sudden demand for U.S. dollars amid escalating tensions linked to the Iran conflict. The increased liquidity aims to ensure stability and readiness in the face of potential market disruptions.

The banks’ decision reflects broader concerns in East Asia and the global financial markets about geopolitical risks impacting currency flows. Japan’s financial institutions are positioning themselves to manage volatility and maintain smooth operations in foreign exchange markets.

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