TOKYO — Department stores in Japan saw their sales fall in June as demand for luxury goods and other big-ticket items slowed. Meanwhile, fast-fashion retailers fared better and saw higher sales.

Fast Retailing said Monday that same-store sales at its Uniqlo stores in Japan grew 4.5 percent in June. Customer numbers were down by 3.6 percent, but the average purchase per customer grew 8.5 percent. There are 807 Uniqlo stores in Japan.

Same-store sales rose year on year in June thanks to the increase in temperature compared to the previous year, and consequent strong sales of summer items,” Fast Retailing said.

Shimamura, another cut-price Japanese clothing retailer and a major Uniqlo competitor, said sales at its Fashion Center Shimamura stores grew 9.2 percent in June, with customer numbers rising 5.5 percent and the average purchase per customer up 3.5 percent. Shimamura opened three stores in Japan in June, bringing its total to 1,350.

Isetan Mitsukoshi Holdings, Japan’s largest department store operator, said sales at its nine stores in the Tokyo metropolitan area fell 5.3 percent on the year last month. None of those individual stores posted sales growth for June.

Sales among Takashimaya’s 17 department stores in Japan slipped 2.5 percent in June. Sales declined at each of the company’s individual stores, with the largest drop being 11.8 percent.

“In addition to a hard fight for clothing sales, the movement of big-ticket items was slow due to the effects of factors such as unstable stock prices,” Takashimaya said.

H2O Retailing, which operates the Hankyu and Hanshin chains of department stores, said sales at those stores were down 1.8 percent on the year in June. This marked the retailer’s second straight month of sales decline.

J. Front Retailing said sales at its 18 Daimaru and Matsuzakaya department stores in Japan dropped 6.9 percent last month, with only two individual stores, including the one in Tokyo, enjoying sales increases. The company’s Daimaru Shinsaibashi store in Osaka saw its June sales decline by 26.2 percent, due largely to a 40 percent reduction in its selling floor space caused by reconstruction work on its main building.

Trading conditions in Japan remain challenging. Japan’s retail sales in May fell 1.9 percent, registering their third straight month of declines, according to the country’s Ministry of Economy, Trade and Industry.