Japan's exports rose 9.8 percent in February from a year earlier, well below analyst expectations in a Reuters poll for a 12.4 percent rise.
The increase still marked a recovery from January when exports rose an annual 9.5 percent as the Lunar New Year slowed shipments.
"There will be continued concerns about the trade numbers and the benefits of the weak yen will always be in focus when these numbers come out," Lim Say Boon, chief investment officer at DBS Private Bank told CNBC Asia's "Squawk Box".
The yen weakened just over 20 percent against the dollar in 2013. Japan's policy makers have been hoping that a weak yen, which gives the country a competitive edge in export markets, will help revive the world's third biggest economy.