The service disruption, which began at
The services returned to normal around
The company said some services, particularly data communication, were impacted nationwide. The cause of the outage remains under investigation.
The trouble affected emergency calls as well as services offered under the company's budget brands. Some mobile service operators that rent KDDI's networks experienced a similar problem, the company said.
The disruption came after the company experienced a massive service outage in July last year, which lasted for about 61 hours.
KDDI "deeply apologizes for the trouble it caused to our customers," it said in a statement.
==Kyodo
© Kyodo News International, Inc., source