A staff of Aeon Co Ltd's supermarket changes a price tag due to a sales tax hike, ahead of the store's opening hours at a supermarket in Chiba, east of Tokyo, late March 31, 2014. Japan's sales tax will rise on Tuesday to 8 percent from 5 percent, the first increase in 17 years and the first step in a two-stage boost that is set to take the levy to 10 percent in 2015 as part an effort to curb the nation's massive public debt. Picture taken March 31, 2014. REUTERS/Yuya Shino (JAPAN - Tags: BUSINESS POLITICS)