Warren Buffett’s Berkshire Hathaway Japanese Stock Holdings Surpass $30 Billion

Warren Buffett’s Berkshire Hathaway has seen its Japanese stock portfolio surpass the $30 billion milestone, with the legendary investor continuing to build positions in the country’s major trading houses that have delivered spectacular returns since their initial disclosure in 2020. The five Japanese trading house investments have collectively gained 392% from their original $6.3 billion value, with Berkshire recently confirming several stakes have crossed the 10% ownership threshold.

Explosive Growth in Japanese Investments

When Warren Buffett first revealed Berkshire Hathaway’s positions in the five Japanese trading houses on his 90th birthday in August 2020, the total investment stood at approximately $6.3 billion. Fast forward to today, and that portfolio has ballooned to $31.0 billion – a remarkable 392% increase driven by both additional purchases and spectacular stock performance ranging from 227% to 551% gains.

The actual total could be even higher, as some recent purchases may not have been publicly disclosed yet. This continued accumulation demonstrates Buffett’s confidence in what he initially called “ridiculous” valuations when he began building positions in these Japanese companies.

Mitsui Stake Reaches 10.1% Ownership

In a significant development, Mitsui & Co. confirmed this week that Berkshire’s National Indemnity subsidiary owned 292,044,900 shares as of September 30, representing a 10.1% stake valued at approximately $7.1 billion. This makes National Indemnity the company’s largest shareholder and marks an increase from the 9.7% position reported in March.

The detailed disclosure came two weeks after Mitsui’s initial announcement that Berkshire had informed them of crossing the 10% ownership threshold. The official Mitsui documentation provides concrete evidence of Berkshire’s growing commitment to its Japanese investments.

Multiple Positions Cross 10% Threshold

Mitsui isn’t the only trading house where Berkshire has increased its ownership stake. In late August, Mitsubishi reported that Berkshire had increased its holding to 10.2% from 9.7% in March. While there haven’t been recent updates on the other three holdings – Itochu, Marubeni, and Sumitomo – market observers expect these positions may have also crossed the 10% mark.

This represents a significant shift from Buffett’s original commitment. In 2020, he promised the companies he wouldn’t raise stakes above 10% without permission. However, as he noted in his 2024 shareholder letter, “As we approached this limit the five companies agreed to moderately relax the ceiling,” indicating mutual satisfaction with the partnership.

Long-Term Investment Philosophy

Buffett’s approach to these investments reflects his classic value investing principles. In 2023, he told CNBC that he was initially attracted to the stocks because “they were selling at what I thought was a ridiculous price, particularly the price compared to the interest rates prevailing at that time.”

The Oracle of Omaha has emphasized that Berkshire will hold these positions for “50 years or forever,” demonstrating his characteristic long-term perspective. This commitment aligns with his historical investment strategy of buying wonderful businesses at fair prices and holding them indefinitely.

Regulatory Framework and Future Outlook

The increased ownership stakes operate within Japan’s regulatory framework, with companies required to disclose when investors cross certain ownership thresholds. The Tokyo Stock Exchange documentation outlines these requirements, which Berkshire has carefully navigated while building its positions.

Key factors driving Berkshire’s Japanese investment success:

Initial undervaluation compared to prevailing interest rates
Strong business fundamentals of the trading houses
Long-term growth prospects in the Japanese economy
Shareholder-friendly policies including dividends and buybacks

As Buffett indicated in his shareholder communication, investors should “likely see Berkshire’s ownership of all five increase somewhat” over time, suggesting the $30 billion milestone may be just another step in a much longer journey.