Japan’s latest inflation data suggests that headline CPI has cooled somewhat, but underlying inflation remains firm and continues to run above the Bank of Japan’s (BOJ) 2% target. This combination strengthens the case that the BOJ has sufficient data support to keep normalizing monetary policy even as the economy faces clear growth headwinds.

The CPI picture: “Softer headline, but a sticky core”

• Headline CPI (Nov 2025): +2.9% YoY, easing slightly from 3.0% the prior month.

• Core CPI (excluding fresh food): +3.0% YoY, marking the 44th consecutive month inflation has been at/above the BOJ’s 2% target.

• “Core-core” CPI (excluding food and energy): +3.0% YoY, down marginally from 3.1% in the previous month suggesting some moderation, but still elevated.

The key point: the headline rate can fall due to energy effects or base comparisons, but the more persistent components (services prices, processed food, labor and input costs) are what ultimately determine whether the BOJ can continue withdrawing accommodation.

Why has inflation in Japan remained “sticky”?

Two major forces stand out:

Food inflation especially the “rice shock”
Rice prices have been one of the most visible drivers of household inflation. Even as the pace of increase has slowed recently, rice inflation remains exceptionally high and has become a major focal point for public sentiment and policy debate.

A weaker yen and imported-cost pass-through
Because Japan relies heavily on imported energy and food, a weaker yen raises import costs and can feed into consumer prices. Even with policy normalization underway, the yen can remain under pressure if the market perceives Japan’s policy stance as still relatively accommodative or if fiscal concerns dominate

The BOJ is pushing rates toward the highest levels in decades but the path remains complicated

The BOJ has signaled a willingness to raise rates further if its inflation and growth outlook materializes. Market reactions often reflect two simultaneous forces:

1. expectations that the BOJ will continue tightening, and

2. uncertainty over how far and how fast it can go without damaging growth.

In other words, the BOJ may still have “room” to move toward a more neutral stance, but that does not mean it can move aggressively.

The biggest risk: weak growth + high public debt + a more expansionary fiscal tilt

Inflation is not yet convincingly anchored at 2% in a sustainable way, while growth signals remain fragile:

• Revised Q3 GDP data showed the economy contracted more than initially estimated (-0.6% QoQ, -2.3% annualized), highlighting the risk that tighter financial conditions could further weigh on activity.

Policy coordination adds another layer of complexity. Political leaders have emphasized the need for proactive spending to support growth and tax revenues rather than excessive fiscal tightening. However, more expansionary fiscal policy can raise concerns about debt sustainability, push bond yields higher, and keep the yen weak effects that can, in turn, feed back into inflation via import prices.

This creates a delicate balancing act:

• tighten too fast → risk crimping an already weak economy;

• tighten too slowly → risk a weaker yen and more persistent cost-push inflation.

What should investors watch next?

1. Spring wage negotiations (Shunto) in 2026: sustained wage growth would strengthen the BOJ’s case for further hikes.

2. Japanese Government Bond (JGB) yields and market liquidity: the 10-year yield is a key signal for funding conditions and fiscal sensitivity.

3. The yen: currency weakness can force a more hawkish tilt to contain imported inflation, but tighter policy can also drag on growth.

4. Food inflation (especially rice): if supply-driven price pressures persist, core inflation may remain elevated longer than expected.

Source: CNBC