Japan just pulled nearly $30B out of US bonds in a single quarter.

Japanese investors sold a net ¥4.67 trillion, roughly $29.6 billion, in US government, agency, and municipal bonds during the first quarter of 2026. It’s the largest quarterly reduction in nearly four years, and the pace of selling only accelerated as the quarter progressed.

The selling picked up speed fast

Sales surged to ¥3.42 trillion in February before jumping again to ¥4.12 trillion in March, suggesting that whatever is driving this trade, Japanese institutions are leaning into it harder with each passing month.

Japan holds approximately $1.203 trillion in US Treasuries. That’s about 13% of all foreign-held US debt, making it the single largest foreign holder.

Now, $29.6B against a $1.2 trillion position is only about 2.5% of Japan’s total holdings. But the acceleration is what has market participants paying attention. Monthly selling nearly quadrupled between January and March.

Why Japan is rotating out

The Bank of Japan has been steadily reducing its purchases of Japanese government bonds, cutting monthly JGB buying from ¥5.7 trillion in August 2024 to approximately ¥2.9 trillion. That’s nearly a 50% reduction in the central bank’s appetite for domestic debt.

When a central bank buys fewer bonds, yields on those bonds rise. Higher domestic yields mean Japanese investors, particularly life insurers and pension funds, can now earn competitive returns at home without taking on currency risk by parking money in US Treasuries.

The Bank of Japan’s policy normalization began tentatively in 2024 with the end of negative interest rates. The reduction in JGB purchases is the next phase of that normalization, and the ripple effects are now clearly reaching US shores.

What this means for investors

TD Economics has projected that Japan’s tapering of US bond investment could push US 10-year yields higher by 20 to 50 basis points over the medium term. A 50 basis point increase in 10-year yields ripples through mortgage rates, corporate borrowing costs, equity valuations, and the federal government’s own interest expense.

If Japanese selling continues to accelerate at the rate seen between January and March, the annual outflow could easily stretch past $100B. That would represent a meaningful structural shift in the demand picture for US debt at a time when supply is already elevated due to persistent federal deficits.

The risk to watch is whether this remains an orderly portfolio rotation or becomes something messier. Japan selling $29.6B in a quarter while holding $1.2 trillion is manageable. Japan deciding to meaningfully reduce that $1.2 trillion position over the next few years would be a different story entirely.