World's (TYO:3612) domestic sales in May rose 15% year-on-year, according to a Wednesday filing on the Tokyo Stock Exchange.
The apparel company's store sales increased nearly 21%, while same-store sales gained 4.9%.
Online sales, which represent the combined revenue from its own website and other companies' sites, fell 6.8%.
At month-end, the company operated 1,986 stores, up from 1,955 in April.