Thanks to a long track record of success, when Warren Buffett sets his sights on a new investment, investors — and markets — take notice. Buffett has recently made a foray into the Japanese market with big investments in five Japanese companies, making it clear he sees value and significant upside potential in Japan. This Barron's article explains Buffett's route into the Japanese market and offers some tips for investors hoping to hitch their wagon to the Berkshire Hathaway chairman.