Tue, 04/11/2023 - 08:23 Tech Insider Warren Buffett.Bill Pugliano/Getty Tags Markets, MI Exclusive, Stocks, Warren Buffett, Berkshire Hathaway, Japan, Trading houses, Sogo shosha, stock portfolio, Foreign investment, Japanese yen, Taiwan Semiconductor, TSMC Source Warren Buffett's Berkshire Hathaway has boosted its bets on 5 Japanese titans -…