Japan plans review of $1.3T foreign exchange reserves as fiscal pressures mount

Japan is taking a hard look at the world’s second-largest foreign exchange war chest. The government plans to review how it manages roughly $1.3 trillion in reserves, a move that could ripple across global currency and bond markets.

The review comes under Prime Minister Sanae Takaichi, whose administration faces a familiar problem: how to pay for things when you’re planning to cut taxes. With the government exploring suspending or modifying its consumption tax, an annual revenue gap of approximately 5 trillion yen needs filling. Those massive reserves, swollen by years of yen depreciation, suddenly look like a very tempting piggy bank.

What’s actually in the reserves

Japan’s foreign exchange holdings sit in the $1.3 to $1.4 trillion range, making them second only to China’s. The composition is about what you’d expect from a cautious central banking apparatus: predominantly US Treasuries, with smaller allocations to deposits, gold, Special Drawing Rights, and IMF positions.

These reserves exist for a very specific reason. They’re Japan’s insurance policy against currency volatility, a tool the government can deploy to defend the yen when markets get ugly. Japan has intervened in currency markets before, most notably selling dollars to prop up the yen during periods of sharp depreciation.

A weakening yen means Japan’s dollar-denominated holdings are worth more when converted back to local currency. That creates paper surpluses that politicians can point to as “available” funds.

The fiscal backdrop

Takaichi’s election victory in February 2026 brought this conversation to the foreground. Japan’s fiscal position is complicated. The country carries one of the highest debt-to-GDP ratios among developed nations, and its consumption tax has long been a politically toxic but fiscally necessary revenue source.

Suspending or modifying that tax creates a hole of around 5 trillion yen annually. The reserves review appears to be part of a broader search for creative solutions.

What this means for investors

The most immediate concern for global markets centers on US Treasuries. Japan is one of the largest foreign holders of American government debt. If the review leads to any rebalancing away from Treasuries, even modest, it could put upward pressure on US yields.

For crypto markets specifically, Japan’s reserve review has no direct connection to digital assets or cryptocurrency investments. The country is advancing its crypto regulatory framework on a separate track, including a flat 20.315% tax rate on eligible crypto gains and developing regulations around stablecoins and electronic payment instruments. Those initiatives exist in a completely different policy lane from the reserves discussion.

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