For roughly a decade, Japanese regional banks treated their own government’s bonds like expired milk. Why bother with negative yields when US Treasuries and equities offered actual returns? Now, one of those banks is coming back to the table.

Iyogin Holdings, a regional banking group, is set to resume purchasing Japanese government bonds (JGBs) for the first time since around 2016. CEO Kenji Miyoshi confirmed the bank will consider re-entering the bond market once yield volatility settles down.

Why now, after ten years on the sidelines

The short answer: Japanese government debt actually pays something now.

Japan’s 10-year JGB yields have climbed to roughly 2.6%, a dramatic departure from the near-zero and outright negative levels that defined the previous era. The catalyst behind rising yields is the Bank of Japan’s gradual retreat from its massive bond-buying program. The BoJ has been reducing its monthly JGB purchases by ¥400 billion per quarter, a tapering schedule designed to slowly wean the market off central bank support. That process began with plans stretching into early 2026, with further reductions mapped out into 2027.

Iyogin isn’t the only institution sniffing around. Sumitomo Mitsui Financial Group has also signaled interest in rebuilding its JGB portfolio.

The bigger picture for Japanese finance

To understand why this matters, you need to appreciate how deeply Japan’s negative rate experiment warped its financial system. When the BoJ pushed rates below zero in 2016, it created a perverse incentive structure. Banks couldn’t earn returns on domestic government debt, so they ventured into foreign bonds, equities, and increasingly exotic investments. Regional banks, which traditionally held JGBs as safe, liquid assets, suddenly had to become global yield hunters.

Iyogin’s move also reflects something subtler: a growing comfort with the direction of Japanese monetary policy. Miyoshi’s comment about waiting for yield volatility to stabilize suggests the bank isn’t diving in blindly. It’s watching the BoJ’s tapering trajectory and making a calibrated bet that the worst of the bond market turbulence is behind them.

What this means for investors

If regional and major banks begin rebuilding JGB positions in earnest, the demand side of the equation strengthens just as BoJ supply withdraws. For Japanese equities, rising yields are a double-edged sword. Banks themselves benefit from a steeper yield curve, since they borrow short and lend long. But companies reliant on cheap borrowing, particularly in real estate and utilities, face higher financing costs.

There’s also a capital flow dimension worth tracking. If Japanese banks start repatriating funds from overseas investments back into domestic bonds, that could reduce demand for US Treasuries and other foreign fixed-income products. Japan has historically been one of the largest foreign holders of US government debt, and any meaningful shift in allocation could ripple through global bond markets.

For now, the signal is clear: a corner of the Japanese banking system that spent a decade avoiding its own government’s bonds has decided they’re worth owning again.