The billionaire founder and CEO Tadashi Yanai told the Financial Times that announcing a state of emergency without making mass testing available was a "mistake".

"Every citizen should be tested so the patients can be identified and isolated," he was quoted as saying in the report on Wednesday.

His comments come after SoftBank Group Corp CEO Masayoshi Son and Rakuten Inc CEO Hiroshi Mikitani have also criticised Japan's response to the outbreak.

The global pandemic has forced the company to close its Uniqlo stores around the world. While most of its 750 stores in China have reopened, roughly 600 in Japan are either temporarily closed or operating shorter hours.

(Reporting by Ritsuko Ando, editing by Louise Heavens)