TOKYO—Japan’s biggest telecommunications company, Nippon Telegraph and Telephone Corp., said it would spend $40 billion to buy the portion of its mobile unit that it doesn’t already own, taking full control of its principal cash cow.
NTT already owns 66.2% of the unit, NTT Docomo Inc., and it said Tuesday it would pay 3,900 yen per share, equivalent to $36.97 to buy out Docomo’s other shareholders. In total, the acquisition will cost the equivalent of $40 billion, NTT said.
The…
