Nippon Telegraph and Telephone Corp. said Sept. 29 it will turn NTT Docomo Inc., Japan’s largest mobile carrier, into a wholly-owned subsidiary through a takeover worth around 4.3 trillion yen ...

NTT Docomo, the largest mobile carrier in Japan, has reported it has been hit with a cyberattack which targeted its systems by flooding networks with traffic from multiple sources, rendering its ...

NTT Docomo Inc. said Thursday ... although mobile phone and other communication services were not affected, it said. Some Japanese firms have reported a series of system failures believed caused ...