TOKYO — Japanese retailers posted mixed sales in July, as clearance events boosted revenues of summer items and slower growth in overseas tourist numbers and reconstruction projects presented challenges.

Fast Retailing said Tuesday that same-store sales at its Uniqlo locations in Japan rose 18.1 percent last month versus the same prior-year period. Customer numbers were up 8.1 percent and the average purchase per customer grew by 9.2 percent.

“Same-store sales rose significantly year-on-year in July, with hot weather in the first half of the month helping generate strong sales of core summer items,” the company said in a release.

After shuttering three stores last month, Fast Retailing now has 804 Uniqlo stores in Japan.

Isetan Mitsukoshi, the country’s largest department-store operator, said that sales from its nine stores in the Tokyo metropolitan area were down 1.3 percent in July. While the Isetan Shinjuku and Mitsukoshi Nihonbashi flagship stores in central Tokyo saw slight increases in revenues, other stores were not as fortunate, particularly ones in the city’s outskirts.

Takashimaya reported that revenues at its 17 department stores in Japan gained just 0.1 percent year-on-year last month, thanks to successful clearance sales. It was the retailer’s first rise in revenues in four months. While men’s wear, men’s and women’s accessories, and designer fashion all sold well, women’s wear and jewelry did not reach the levels of July 2015.

H2O Retailing, which operates the Hankyu and Hanshin chains of department stores, said July sales among those stores were up by 2.3 percent. The Hankyu Umeda flagship store in Osaka performed particularly well, posting sales growth of 3.4 percent.

J. Front Retailing said revenues at its 18 Daimaru and Matsuzakaya stores in Japan dropped 2.7 percent. The biggest single-store decrease came from the Daimaru Shinsaibashi store in Osaka, where revenues declined 20.1 percent. That location is undergoing reconstruction work on its main building, and its sales area has temporarily shrunk by about 40 percent. Excluding the negative effect of that store, revenues at other Daimaru and Matsuzakaya locations would have contracted by 0.2 percent.