Store chain giant Fast Retailing Co has announced a 13.7 per cent year-on-year same-store sales rise, on good sales of Body Tech inner sportswear and button-down shirts.

The increase compared to a 5.4 per cent drop in May, a 1.4 per cent drop in April, and a 15.2 per cent drop in March.

Sales at directly owned stores jumped 20.8 per cent year-on-year in June.

Fast, which operates the Uniqlo casual-clothing chain, said that a new governmental policy encouraging workers to dress more lightly had spurred on sales of its apparel during June.