Japan’s Bond Market Turbulence Is Pressuring the BOJ to Slow Its Taper

The BOJ has warned that if oil prices stay elevated and the yen remains weak, core inflation could hover around 3% for two years in a risk scenario—well above the bank’s 2% target.

Some policymakers have indicated that prolonged energy shocks could eventually justify interest‑rate increases if they lead to broader inflation pressures in the economy.

This creates a dilemma: inflation pressures argue for tighter policy, but financial stability concerns in the bond market argue for caution.

Why the BOJ May Slow Its Taper

Because of these tensions, policymakers are increasingly expected to take a cautious approach to reducing bond purchases.

Financial market turbulence has highlighted fiscal strains and inflation pressures, increasing the likelihood that the BOJ could slow the pace of balance‑sheet reduction if market conditions worsen.

Feedback from banks and institutional investors has reinforced this message. In meetings with the central bank, many participants urged the BOJ to maintain or only modestly reduce its bond‑buying pace from fiscal 2026 onward to avoid destabilizing the market.

Rather than abandoning policy normalization entirely, the likely strategy is to proceed gradually—allowing yields to rise while preventing abrupt spikes.

What Markets Expect From the June BOJ Policy Review

At the BOJ’s upcoming policy review, economists widely expect a cautious compromise.

The most likely outcome is:

• The short‑term policy interest rate remains around 0.5%.
• The existing bond‑purchase taper continues in the near term.
• The BOJ signals a slower pace of reductions in bond buying starting in the next fiscal year.

Such an approach would allow the central bank to keep moving toward normalization while reassuring investors that it will not withdraw support too abruptly.

Why Global Markets Are Watching

Developments in Japan’s bond market matter far beyond the country itself.

Japan has historically been one of the largest investors in overseas bonds. If domestic yields rise, Japanese insurers, banks, and pension funds may shift money back home instead of buying foreign debt.

That shift could have several global effects:

• Higher global yields: Reduced Japanese demand for foreign bonds could push up yields in markets such as U.S. Treasuries.
• Currency volatility: Changes in BOJ policy could move the yen sharply.
• Carry‑trade risk: Investors who borrowed cheaply in yen to buy higher‑yielding assets may unwind those trades if Japanese rates rise or the yen strengthens.

Because these flows are large, even gradual policy changes in Japan can ripple across global bond, currency, and equity markets.

The Bottom Line

Japan’s bond market volatility reflects a deeper transition: the BOJ is slowly unwinding one of the most aggressive monetary‑stimulus programs in modern history.

Rising yields, inflation pressure from energy costs, and fragile market liquidity are forcing policymakers to proceed carefully. The central bank is still moving toward tighter policy—but the recent turbulence suggests that the path out of ultra‑easy money will be gradual and uneven.