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 in anticipation of sudden demand for U.S. dollars amid ongoing tensions related to the Iran conflict. The increased liquidity aims to strengthen the banks' ability to manage foreign currency needs in a volatile geopolitical environment.

These developments highlight the banks' proactive approach to risk management in East Asia's complex financial landscape.

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