Toshiba's CEO had good reason to sound a trifle defensive about his company's $5.4 billion purchase of U.S.-based nuclear power company Westinghouse.

After all, almost every other high-profile Japanese corporate buyout in the U.S. has turned out badly.

"I'd like to make this the first success story," CEO Atsutoshi Nishida said following the announcement earlier this month that the electronics company will buy Westinghouse Electric Co. from British Nuclear Fuels PLC.