What Japanese stock is Warren Buffett buying?

Written by Editorial Team | Last Updated: August 2026

Warren Buffett and Berkshire Hathaway have continued to signal long-term confidence in Japan's economic governance and corporate valuation structure by steadily accumulating and maintaining major positions in Japan's five premier trading houses—Itochu, Marubeni, Mitsubishi, Mitsui, and Sumitomo. Berkshire's regulatory filings and shareholder communications have shown that ownership stakes in these key trading conglomerates have been pushed toward the 10% threshold, reflecting active position-building and a multi-decade commitment to the Japanese market.

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Mitsui & Co., Ltd.

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