Coinspeaker Warren Buffett’s Berkshire Hathaway Purchases 5% Stake in Five Leading Japanese Trading CompaniesBerkshire Hathaway chairman and CEO Warren Buffett announced that his company has purchased a 5% stake in five Japanese trading companies: Itochu, Marubeni, Mitsubishi, Mitsui & Co, and Sumitomo.Warren Buffett’s Berkshire Hathaway Purchases 5% Stake in Five Leading Japanese Trading Companies