LOS ANGELES (MarketWatch) -- Japanese retailers registered a sharp rebound in June sales, which rose 1.6% from a year earlier, compared to May's 0.8% gain, the Ministry of Economy, Trade and Industry said Monday. The result was slightly below average expectations for a 1.9% gain, according to a Reuters survey of analysts. Among large-scale retailers, June sales jumped 3.5% from year-earlier levels on a same-store basis, swinging from a 0.4% drop in May. The yen weakened following the data, with the dollar rising to 97.93 from 97.88 just ahead of the release. However, Singapore-traded futures for the Nikkei Stock Average /zigman2/quotes/210597971/delayed JP:NIK -0.39% remained weak, down 2%, just as they were prior to the sales report.