Japan's consumer prices in June increased 3.3 percent on yearly basis, marking the 13th straight monthly advance, Japanese Internal Affairs Ministry said Friday.

The core consumer price index, excluding fresh foods, stood at 103.4 against the 2010 base of 100, according to the ministry.

The rise of energy prices partly contributed to the upturn, which surged 9.6 percent in the reporting period, with gasoline prices climbing 10.6 percent.

Meanwhile, the data have also been affected by the consumption tax hike since April. After excluding the direct effect of the tax rise, the inflation rate in June comes to 1.3 percent

The core CPI for Tokyo's 23 wards in July, which indicates nationwide price moves down the road, grew 2.8 percent, up for the 15th consecutive month.