Japan Core-Core CPI YoY in 2026
Japan's core-core CPI is more likely than not to stay above 1.9% in 2026, but the odds of a sub-2% annual reading are meaningful because price pressures have been easing from their peak. I would put Yes at 27%, below the level implied by the current market but not by a huge margin.
Analysis
The key issue is not whether Japanese inflation is still elevated, but whether the 2026 annual average for core-core CPI can cool enough to come in at 1.9% or lower. Core-core CPI excludes both fresh food and energy, so it is driven mainly by services, processed food, wages, and broader domestic pricing behavior rather than the volatile commodity components that have dominated earlier inflation swings. That makes this measure slower to fall than headline inflation, which is why the market is currently leaning strongly toward No at 82.5%, but it also means a steady deceleration can occur even without a dramatic economic downturn.
There are solid arguments that 2026 will be milder than the inflation peak seen in the prior cycle. Imported cost pressure has already eased relative to the worst of the yen and commodity shock period, and those effects tend to fade through the annual average. If wage growth normalizes and firms become less aggressive in passing through costs, the core-core rate can drift down gradually through the rest of the year. Because the market question uses the full 2026 annual figure, the second half of the year matters a lot; a clear softening from the current pace could pull the yearly average down toward the threshold.
Against that, Japan has had a persistent service-price and wage dynamic that tends to keep core-core inflation sticky once it is above 2%. Even if food and energy pressures ease, the components inside core-core are not especially volatile and usually respond slowly to monetary tightening or weaker growth. That means a 2026 average at or below 1.9% likely requires a fairly clean disinflation sequence rather than a brief dip in one or two months. My baseline is that the annual reading lands slightly above the threshold, but the margin is narrow enough that the Yes outcome is still plausible if the yen strengthens, domestic demand softens, or wage pass-through fades faster than expected.
Arguments
For
- Arguments for Yes: inflation momentum has likely peaked, so the 2026 average may drift below 2% if monthly readings soften steadily.
- Arguments for Yes: the removal of earlier imported-cost shocks should keep pushing the underlying rate down as the year progresses.
- Arguments for Yes: if demand cools and firms become less willing to raise prices, the annual figure can slip to 1.9% or lower.
Against
- Arguments against Yes: core-core inflation in Japan is historically sticky and often stays above 1.9% once wages and services prices are rising.
- Arguments against Yes: if early-2026 readings are still around 2%, the full-year average probably ends up above the cutoff even if later months improve.
- Arguments against Yes: the market is already pricing a large chance of No, suggesting the consensus sees persistent underlying inflation.
Key drivers
- Easing imported-cost pressure should continue to reduce the underlying inflation pace through 2026.
- Core-core CPI is sticky, but it can still drift lower if wage pass-through and services inflation moderate.
- The annual-average structure means late-2026 softness would meaningfully pull down the final reported figure.
Risk factors
- Services inflation and wage growth could remain resilient enough to keep the annual rate above 1.9%.
- If the first half of 2026 stays near or above 2%, the full-year average may be too high to satisfy the threshold.
- A weaker yen or renewed domestic pricing power could keep core-core inflation stubbornly elevated.
Scenarios
Best case
Inflation cools faster than expected in the second half of 2026, the yen strengthens, and services price increases slow enough that the annual core-core CPI average lands at 1.9% or lower.
Most likely
Core-core CPI eases gradually but not enough to break the threshold, leaving the 2026 annual figure just above 1.9% and producing a No resolution.
Worst case
Underlying wage and services inflation stay firm, monthly readings remain around 2% or higher, and the official 2026 annual figure finishes comfortably above 1.9%.
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