Aya Wagatsuma

Stay informed with Aya Wagatsuma’s coverage and analysis for Fortune.

Fujikura, which makes wire cabling for data centers, is up more than 400% this year.

AI boom makes 139-year-old cable company Japan’s hottest stock

By Aya Wagatsuma and Bloomberg

Warren Buffett, chairman and chief executive officer of Berkshire Hathaway Inc., plays bridge at an event on the sidelines of the Berkshire Hathaway annual shareholders meeting meeting in Omaha, Nebraska, U.S., on Sunday, May 6, 2019. The annual shareholders’ meeting doubles as a showcase for Berkshire’s dozens of businesses and a platform for its billionaire chairman and CEO to share his investing philosophy with thousands of fans. Photographer: Houston Cofield/Bloomberg via Getty Images

Warren Buffett credits Japan’s trading houses for their ‘superior’ shareholder-friendly policies, days after the country’s stock market broke a 35-year-old record

By Aya Wagatsuma and Bloomberg

ANAHEIM, CALIFORNIA – SEPTEMBER 30: Shohei Ohtani #17 of the Los Angeles Angels before a game against the Oakland Athletics at Angel Stadium of Anaheim on September 30, 2023 in Anaheim, California. (Photo by Ronald Martinez/Getty Images)

Shohei Ohtani’s record $700m contract with the LA Dodgers is boosting his sponsors’ stock prices and expected to have a $437m impact in just one year

By Aya Wagatsuma and Bloomberg