Japan's Three Mega-Banks' Foreign Currency Liquidity Rises to $1.25 Trillion, Up 18% in 18 Months
0xBroomberg
MUFG, SMBC, and Mizuho have added $190 billion in foreign-currency liquidity over 15 months, pushing the combined total to $1.25 trillion — the fastest build-up since 2010, as Japan's banking system stockpiles dollars against a potential squeeze.
How big is $1.25 trillion?
As of end-June 2026, the three megabanks held $1.25 trillion in foreign-currency deposits and market funding — up roughly 18% from about $1.06 trillion at end-March 2025.
This means → a net increase of over $190 billion in 15 months. The Bank of Japan says the pace has not been seen since 2010.
In plain terms = Japan's three largest banks are stacking dollars at the fastest rate in fifteen years — a sum comparable to a mid-sized country's entire foreign-exchange reserves.
Who is leading the charge?
MUFG (三菱日聯) saw the sharpest jump: foreign-currency holdings rose 32% to $466 billion.
Market funding — money borrowed in wholesale markets — more than doubled; customer foreign-currency deposits grew 8%.
This means → MUFG is not just passively receiving client deposits. It is actively borrowing dollars in the open market — an offensive stockpiling posture.
SMBC and Mizuho also expanded holdings, but did not disclose detailed figures.
What are they bracing for?
A senior executive at one of the megabanks: "We have been preparing for a scenario where clients struggle to access dollars due to market turmoil."
The immediate trigger: the U.S. and Israel launched strikes on Iran in late February this year. Ceasefire talks are now stalled, and geopolitical risk continues to weigh on sentiment.
In plain terms = the banks' fear scenario is simple — if tensions escalate, dollar liquidity could dry up overnight, leaving clients unable to fund operations. So they are pre-loading.
Beyond geopolitics — what else is driving dollar demand?
Tariff-deal investment commitments: Japan has reached a tariff agreement with the U.S. that includes pledges to increase investment in America. Those commitments translate into real dollar-buying pressure.
Lower borrowing costs: since the Fed began its latest easing cycle in 2024, dollar funding costs have fallen steadily from their peak — making it objectively cheaper for banks to scale up foreign-currency funding.
This means → geopolitical risk is the "push"; cheaper funding is the "pull." Both forces acting at once explain a stockpiling pace not seen in fifteen years.
What are Japanese companies doing on their own?
By end-June, Japanese companies had raised their committed bank credit lines — facilities that let them draw yen on demand — by ¥6 trillion compared to late January, before the Iran strikes began.
That is the largest single-period increase since the COVID-19 pandemic in 2020.
In plain terms = it is not just the banks hoarding dollars. Corporates are simultaneously stockpiling yen lifelines — banks in foreign currency, companies in local currency. The entire system is shifting into defensive mode.
Could this preparation go too far?
This reflects rising funding pressure on Japanese companies' overseas operations. The banks' build-up is both a proactive response and a potential case of over-hedging.
Two variables will be decisive: the trajectory of U.S.–Iran tensions determines whether the geopolitical risk materializes; the path of dollar funding costs determines whether the stockpile stays affordable.
This means → if tensions ease and funding costs keep falling, these hoarded dollars could turn into a low-cost strategic reserve. If not, it becomes expensive — but possibly necessary — insurance.
Content is for reference only, not financial advice.