Nippon Steel Corp. said Tuesday its wholly owned subsidiary, United States Steel Corp, will invest $350 million to revamp its largest blast furnace, part of the $11 billion investment the Japanese company promised to the U.S. government in winning approval for the acquisition of the U.S. steelmaker. U.S. Steel said…

Nippon Steel Corp said it aims to invest around $6 trillion yen ($39 billion) over the next five years domestically and globally, including upgrading the facilities of the recently acquired United States Steel Corp. The Japanese steelmaker's new medium- to long-term management plan unveiled Friday underscored its focus on strengthening…