The top government spokesman indicated Thursday it will be difficult for Japan to accept China's call to cooperate in an investigation into an orgy at a south China hotel in September involving hundreds of Japanese businessmen and Chinese prostitutes.

"Japanese investigative authorities will deal with (the case) in line with domestic law," Chief Cabinet Secretary Yasuo Fukuda told reporters. Beijing has called on Tokyo through diplomatic channels to cooperate in the probe, he said.

The Zhuhai Intermediate People's Court also asked Interpol to issue "red notices" on three Japanese men accused of arranging prostitutes for 285 Japanese at the Zhuhai International Conference Center Hotel in Guangdong Province in September, Xinhua News Agency reported.

According to the news reports, the sex party ran over three days, ending Sept. 18.

That was the anniversary of a Japanese attack on a city in northeast China in 1931 that many Chinese regard as the start of Japan's wartime invasion and occupation.

Xinhua identified the men as Isao Hirobe, Shunji Takahashi and Koji Fukunaga.