Japan's national CPI rose to 1.5% YoY in March, up from 1.3% in February, its lowest in nearly four years.
Core CPI increased to 1.8% YoY, beating 1.7% expectations but staying below the BOJ's 2% target for a second month.
Higher fuel and transportation costs amid the Middle East conflict drove the inflation rise, offset by government subsidies and strategic fuel releases.
The BOJ is expected to keep rates unchanged at its upcoming meeting, though analysts foresee possible hawkish signals and a June rate hike.