Japan's three largest banks—MUFG, Sumitomo Mitsui, and Mizuho—have collectively boosted their foreign currency liquidity buffers to $1.25 trillion. This move is seen as a precautionary measure to prepare for sudden dollar demand amid escalating tensions related to the Iran conflict. The increased liquidity aims to strengthen the banks' ability to manage foreign currency risks in an uncertain geopolitical environment.

The development was reported by Nikkei Asia on August 9, 2026, highlighting the strategic financial adjustments by these key Japanese financial institutions in response to regional and global economic pressures.

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