Japan core CPI rose 1.8% y/y in March, matching forecasts but staying below BOJ’s 2% target for a second month. Iran war energy shock seen pushing inflation higher in coming months.
Summary
Japan CPI (March 2026):
Headline rate 1.5% y/y (prior 1.3%)Core CPI (Ex-Food) 1.8% y/y (vs. expected 1.8%, prior 1.6%)Core-core CPI (Ex-Food & Energy) 2.4% y/y (prior 2.5%), slowest rise since December 2024
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Core CPI below the BOJ’s 2% target for a second consecutive month, held down by government fuel subsidies and moderating food inflationCore-core measure eased slightly but remains comfortably above target, pointing to underlying demand-side price pressureIran war energy shock expected to filter through more forcefully in coming months as companies pass on higher fuel costsWholesale inflation already rising sharply, acting as a leading indicator for consumer price acceleration aheadData lands one week before the BOJ’s April 27-28 meeting, where a hold at 0.75% is expected but a hawkish signal on June is anticipatedReal wages under threat if energy-driven price rises outpace government subsidy support
Japan’s core inflation held below the Bank of Japan’s 2% target for a second consecutive month in March, with government fuel subsidies and moderating food costs providing a temporary buffer against the energy price shock flowing from the Iran war. The respite, however, is widely expected to be short-lived.
The core consumer price index, which strips out volatile fresh food costs, rose 1.8% year-on-year in March, matching the median market forecast and picking up from 1.6% in February. The headline rate came in at 1.5%, up from 1.3% the prior month. A broader underlying measure excluding both fresh food and energy — the so-called core-core index closely watched by the BOJ as a gauge of demand-driven inflation — eased slightly to 2.4% from 2.5% in February, its softest reading since December 2024.
On the surface, the numbers are orderly. In practice, the pipeline pressures building beneath them are anything but. The Iran war has effectively closed the Strait of Hormuz, a critical chokepoint handling around a fifth of global oil and gas flows, driving crude prices sharply higher and adding to the cost burden facing Japanese companies that are heavily reliant on Middle East energy imports. Japan’s wholesale inflation jumped in March as those raw material costs fed through the supply chain — a leading indicator that consumer prices are likely to follow.
Masato Koike, senior economist at Sompo Institute Plus, captured the concern directly: cost-push pressure from the Middle East conflict will likely lift prices across a broad range of goods, not just energy. Government subsidies may cushion some of that upward pressure, he noted, but not all of it — creating a risk that real wages turn negative if price growth outpaces income gains.
The March data arrives one week before the BOJ’s April 27-28 policy meeting, where the board is widely expected to leave its benchmark rate unchanged at 0.75%. The case for a hold is clear — with core inflation still fractionally below target and global uncertainty elevated, moving now would carry unnecessary risk. But the meeting is unlikely to be a quiet one. Policymakers are expected to use the quarterly outlook report and Governor Kazuo Ueda’s post-meeting press conference to lay the groundwork for a move as early as June, revising inflation forecasts higher and signalling a readiness to act flexibly against mounting price risks.
That hawkish lean reflects the BOJ’s broader predicament. Having exited its decade-long stimulus programme in 2024 and raised rates several times since — most recently to 0.75% in December — the central bank has been navigating toward a neutral rate that markets estimate at around 1.5%. The Iran war has complicated that journey by adding an externally driven inflation shock to a domestic price backdrop that was already running above target for close to four years. Nearly two-thirds of economists surveyed by Reuters expect the policy rate to reach 1.0% by end-June. The March CPI data does nothing to alter that trajectory — if anything, it reinforces it.
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The on-target core reading removes any immediate pressure on the BOJ to act at next week’s meeting, reinforcing the widely held view of a hold at 0.75%. However, the forward-looking picture is more unsettling for markets. With wholesale prices already climbing and companies beginning to pass on higher fuel costs, core inflation is expected to re-accelerate above the BOJ’s 2% target in coming months. That trajectory keeps a June or July rate hike firmly in play and maintains upward pressure on the short end of the Japanese yield curve. For the yen, the combination of a near-term hold and a hawkish forward signal is a nuanced backdrop — any dovish surprise from Ueda next week could see the currency give back recent gains.
This article was written by Eamonn Sheridan at investinglive.com.