Japan's consumer inflation held steady above the central bank's target in March and an index excluding fuel costs rose at the fastest annual pace in four decades, data showed, indicating broadening price pressure in the world's third-largest economy.
"Inflationary pressure is proving stronger than expected and could last for longer than thought," said Shinke Yoshiki, chief economist at Dai-ichi Life Research Institute.
"But there's still a lot of uncertainty on whether wages will rise durably and underpin consumption, which may keep the BOJ in a holding pattern."
The core consumer price index, which excludes volatile fresh food, but includes energy costs, rose 3.1% in March from a year earlier, government data showed on Friday, matching a median market forecast.
It followed February's increase of 3.1%, which was a sharp slowdown from January's 41-year high of 4.2%, due largely to the effect of government subsidies to soften the cost of utility bills for homes.