Chairman of U.S. Berkshire Hathaway Inc. Warren Buffett wearing Korean traditional dress Hanbok attends the groundbreaking ceremony for Taegu Tec Ltd.'s second plant in Daegu city, Gyeongsangbuk-do province of South Korea, on March. 21, 2011. Warren Buffett said here Monday that it's a great opportunity to invest in Japanese stock market after the massive earthquake. [Xinhua/Park Jin Hee]