四年翻四倍，巴菲特押注日本股票超300亿美元！

Core Insights - Berkshire Hathaway's investment in Japan's five major trading companies has surged from approximately $6.3 billion to over $30 billion, quadrupling in value and surpassing the 10% ownership limit [1][4][6] - Warren Buffett has expressed a commitment to hold these Japanese stocks for the long term, potentially for "50 years or forever" [1][11] Investment Growth - The value of Berkshire's holdings in the five Japanese trading companies has increased by 392% from $6.3 billion on August 30, 2020, to $31 billion [4][8] - The stock prices of these companies have risen between 227% and 551% during this period, contributing to the overall investment success [4][9] Shareholding Details - Berkshire's stake in Mitsui & Co. has reached 10.1%, valued at approximately $7.1 billion, with an increase in shareholding from 9.7% earlier this year [5][11] - Similar increases have been reported for Mitsubishi Corporation, with its stake rising from 9.7% to 10.2% [5] - For the other three companies—Itochu, Marubeni, and Sumitomo—market expectations suggest that Berkshire's holdings may also be close to or exceed 10% [5] Investment Rationale - Buffett was attracted to these stocks due to their perceived low prices relative to interest rates at the time of investment [10] - Initially, Buffett committed not to exceed a 10% stake without permission, but this limit was later adjusted to allow for increased holdings as the investment value became apparent [11]