The operator of the au mobile brand, one of Japan's top three carriers, said Saturday its customers are facing difficulties making calls and connecting to the internet, with the nationwide network troubles affecting a range of services from weather data and banking to parcel delivery.
KDDI Corp. said work to restore services is still underway after the disruption started at around 1:35 a.m. The troubles have not only rippled to its and other firms' low-cost mobile services, but have also affected transmission of key data such as weather information.
The cause and how many users had been affected are being investigated, according to KDDI.