NTT Docomo said on the 5th that calls and data are hard to use on mobile services across the country that run on its network. The carrier said the cause is under investigation.
Docomo said it believes there is a high possibility its servers were hit by unauthorized access, and has suspended service at its online Docomo Shop, where new contracts can be taken out. Whether the outage and the unauthorized access are connected is not known, the company said.
My Docomo, where subscribers check bills and change their contracts, has also been stopped. On its official account, Docomo said that as of 2 p.m. on the 5th, voice calls, data communication and SMS were difficult to use.
On X, the terms for "voice calls" and "Docomo mobile" entered the trending list. Users posted "Has Docomo been hit this time?!", "This is a problem — when will it be fixed", "So that's why my Docomo phone wasn't working", "Docomo next, there are a lot of outages" and "Has unauthorized access finally reached Docomo too?"
The outage comes days after a separate disruption forced e-Tax, the national online tax filing system, into emergency maintenance after suspicious traffic was detected, with no information leak confirmed.