Berkshire Hathaway buys $1.8 billion stake in Japan's Tokio Marine

Berkshire Hathaway, the investment company led by Warren Buffett, is buying a $1.8 billion stake in Tokio Marine, a major Japanese insurance company. The deal gives Berkshire a 2.49% ownership share in the firm.

The companies also announced they are forming a partnership. The move is part of Berkshire Hathaway's ongoing investment activity in Japan.