Japan Core Inflation Hits 1.8% as Iran War Lifts Energy

Japan's national core consumer price index rose 1.8 percent year over year in March, matching consensus and accelerating from 1.6 percent in February, in the first pickup in five months. The re-acceleration, released Friday morning in Tokyo, pins much of the pressure on energy costs driven by the Iran war and complicates the Bank of Japan's rate path days before its policy meeting.

The Numbers

According to CNBC, SwingFish and investingLive, national core CPI excluding fresh food rose 1.8 percent in March. Headline CPI came in at 1.5 percent year over year, up from 1.3 percent in February but still below the Bank of Japan's 2 percent target for a second straight month. "Core-core" CPI, which excludes both food and energy, dipped to 2.4 percent.

The March print is the first in which core inflation has accelerated rather than softened since October 2025, ending a five-month disinflationary run.

The Iran Channel

Brent crude traded above 106 dollars a barrel on Friday, per Invezz, feeding directly into Japan's imported energy bill. CNBC's coverage placed the Iran war at the center of the inflation story, noting that energy worries are stoking the first core-CPI re-acceleration in months.

Analysts cited by CNBC and WTAQ/Reuters warned that core inflation could approach 3 percent by the end of fiscal 2026 if crude stays elevated and there is no expansion of energy subsidies.

Hawkish Hold Expected

The Bank of Japan meets 27 to 28 April. Citi analysts expect a hold at 0.75 percent accompanied by hawkish language, given yen depreciation and inflation risks. Reuters reported that core inflation remains below the BOJ target while energy risks grow.

The print lands as a clear channel through which the Iran war is now reaching Japanese households. It reinforces a broader narrative in which the Middle East conflict is becoming a tax on energy-importing economies.