On Monday, the Nikkei 225 index rose by over 2,000 points, surpassing the 56,000 mark for the first time in history. According to Jin10, this surge has increased the market value of Berkshire Hathaway's investments in Japan's five major trading houses to over $41 billion. Since 2019, Warren Buffett, who has stepped down as CEO of Berkshire, has made significant investments in Japanese stocks. The rally in Tokyo's stock market on Monday led to a nearly $2 billion increase in the value of these stocks in a single day. Details from Berkshire's financial reports reveal that the investment cost was approximately $13.8 billion, indicating that the value of this investment has nearly doubled.