Reuters out with a latest poll on Japan’s trade and CPI data due to be reported next week.
Analysts see a global economic upturn continuing to support Japanese trade.
Exports were seen likely to have grown 7.8 percent in April from a year ago after jumping 12.0 percent in March, the biggest gain in more than two years.
Imports were expected to increase 14.8 percent last month from a year earlier taking the trade surplus to 520.7 billion yen ($4.69 billion).
Core consumer prices are expected to have accelerated last month, led by energy costs.
Prices of other items remained weak, analysts say, suggesting there is some way to go before the Bank of Japan's 2 percent price growth target is reached.
The core consumer price index (CPI), which includes oil products but excludes volatile fresh food prices, likely rose 0.4 percent in April from a year earlier, up for a fourth straight month