Warren Buffett's Japan bet that he discovered by reading a 'little handbook' is up as much as sixfold

Warren Buffett’s Berkshire Hathaway has realized substantial gains from its 2020 investment in five major Japanese trading houses, with stock prices more than tripling and the portfolio value reaching $23.5 billion from a $13.8 billion cost basis. JPMorgan attributes this success to the "Buffett effect," which enhanced valuations and influenced capital allocation, and anticipates Berkshire will continue to increase its stakes beyond 10% in these long-term holdings, benefiting from significant annual dividend income ($812M) hedged against yen debt costs ($135M).

Analysis

Berkshire Hathaway's investment in five leading Japanese trading houses—Itochu, Marubeni, Mitsubishi, Mitsui, and Sumitomo—has proven highly profitable, with the portfolio's market value growing to $23.5 billion from an initial cost of $13.8 billion. According to JPMorgan, this performance, which includes stock price appreciation of over 300% for all five companies since August 2020, is attributable to a "Buffett effect" that corrected long-term undervaluation and improved management focus on shareholder returns. The investment's financial structure is particularly attractive, utilizing yen-denominated debt to hedge currency risk, creating a significant positive carry trade. This strategy is expected to generate approximately $812 million in annual dividend income in 2025 against a debt interest cost of only $135 million. Berkshire's commitment to the holdings is explicitly long-term, with statements indicating no intention to sell for decades and agreements in place to increase stakes beyond an initial 10% ceiling, a threshold already surpassed in Mitsubishi and Mitsui & Co. JPMorgan anticipates Berkshire will continue to moderately increase its positions, reinforcing the long-term value thesis.

Key Decisions for Investors

• Investors should consider the strong bullish signal from Berkshire Hathaway's continued accumulation and multi-decade holding commitment for the Japanese trading sector, suggesting a long-term value opportunity.
• A selective approach may be warranted, as JPMorgan's recent coverage differentiates among the five firms, assigning 'overweight' ratings to Itochu, Mitsui & Co., and Marubeni, but 'neutral' to Sumitomo and 'underweight' to Mitsubishi.
• Monitor the dividend policies of the Japanese trading houses and yen interest rates, as the significant positive carry between dividend income and debt costs is a core pillar of the investment's profitability.
• Given that the stocks have already more than tripled, new investors should assess current valuations to determine if the 'Buffett effect' and improved fundamentals are already fully priced into the shares.