Microsoft says it is challenging the Japanese Fair Trade Commission's acceptance of Yahoo Japan's search deal with Google. Google is powering Yahoo Japan's search and search ad platform, while Yahoo is switching to Microsoft Bing. - Microsoft July 30 said it planned to challenge the Japanese Fair Trade Commission's acceptance of Yahoo Japan's search deal with Google. Yahoo Japan July 27 agreed to let Google power its search and search advertising platform despite the fact that its U.S.-based investor, Yahoo, is switching to...