Why the BOJ Is Set to Raise Rates to the Highest Level Since 1995

For decades, Japan’s interest rates lived in the basement, basically free money with a yen sticker on it. Now the Bank of Japan is about to flip the switch. At its Dec. 18–19 meeting, Governor Kazuo Ueda is widely expected to raise the policy rate by 25 basis points to 0.75%, the highest level since 1995. This is not a victory lap. It’s a tightrope walk. Japan has inflation that will not chill out, a yen that keeps flirting with weakness, and a government that cannot afford a big jump in borrowing costs with debt around 240% of GDP. So why hike now, and what breaks if the BOJ missteps?

Source: Bloomberg

Why the BOJ’s Hiking Now

Japan’s inflation story has changed, and the BOJ is basically admitting it cannot keep pretending this is still the deflation era.

Source: Bloomberg

• Inflation has remained above the BOJ’s 2% target for more than three years, strengthening the case that price pressures are not a one-off.
• Wage momentum matters. The BOJ has repeatedly framed wage gains as the key condition for durable, demand-driven inflation, and recent reporting suggests that wage momentum remains strong enough to “clear the bar” for a hike.
• Real rates are still low. Even at 0.75%, the BOJ can argue policy remains accommodative, which is why officials have signalled the hiking cycle could extend beyond that level.
• Neutral rate debate: Officials and advisers keep circling the “neutral rate” question, but they also admit it’s fuzzy, and they won’t use it as a hard rulebook.

Bottom line: the BOJ is hiking because inflation and wages are no longer giving it cover to sit still, and yen weakness makes the “wait and see” approach more painful for households.

A weaker yen does not just move FX charts; it shows up at the grocery store. When the yen weakens, imports like energy and food get pricier, and companies push those costs through to consumers. Japan’s policy debate now sits at the intersection of inflation control and political survival, because voters do not care about theory when the cost of living squeezes them. That is why the BOJ is stuck managing inflation while Japan’s politics push for relief and stability at the same time.

Inflation vs. Debt

Here’s the catch: Japan has a giant public debt load, and even modest rate increases can make bond investors edgy. In fact, 10-year JGB yields rose to about 1.97%, an 18-year high, as investors worried about fiscal expansion and the implications for government financing. Prime Minister Sanae Takaichi has leaned into growth-oriented spending and argued Japan should pursue “proactive” fiscal policy rather than aggressive tightening. But markets are watching the math: bigger spending plans plus rising yields can turn into a nasty feedback loop. This is where the BOJ’s job gets awkward. It needs to fight inflation and support the yen, while avoiding a bond-market tantrum that raises borrowing costs fast.

Why Global Markets Keep Flinching

Japan’s rate move matters globally because it touches the yen carry trade, the classic strategy of borrowing cheap yen and buying higher-return assets elsewhere. Barron’s flags the risk plainly: BOJ tightening can disrupt carry dynamics and reduce appetite for assets like U.S. Treasuries, especially as the yield gap narrows. That’s why crypto folks are watching too. When the yen strengthens and liquidity tightens, higher-beta assets can wobble. The twist this time: yields have already been rising, and the market has been pricing in a hike for weeks. So the real market mover may not be the hike itself, but Ueda’s guidance on what comes next.

Takeaway

A 0.75% policy rate sounds small if you live in a world of 4% and 5% benchmarks. But Japan is not just another central bank. It’s a pillar of global funding markets, and even modest tightening can ripple across bonds, equities, FX, and crypto. If you advise clients, manage treasury risk, or build portfolio allocations, keep an eye on three tells after the decision: yen direction, long-end JGB yields, and BOJ guidance on the pace of future hikes.