Why Japan Is Wary of Foreign Cash

As Chinese and Arab investors weigh big stakes in Japanese companies, concerns grow over corporate raiding and sharing tech knowhow

It's been a grim year for Japan's stock market. The Nikkei 225 index of leading stocks has slumped 18% from its 2007 peak as foreign investors, who control about 30% of trading on the Tokyo Stock Exchange, have pulled money out of the market following the U.S. subprime mortgage mess. But could a new class of overseas investors fill the void in Japan?

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