The increase in the core consumer price index, which excludes volatile fresh food prices but include oil products, was 2.8 percent rise and followed a 1.0 percent gain in March.
Nationwide core consumer prices in March rose 1.3 percent from a year earlier, a 5-1/2 year high.
The consumer price index in March 2014 was 101.0 (2010=100), up 0.3 percent from the previous month, and up 1.6 percent over the year.
