Large parts of Softbank’s mobile network have remained out of operation across central Japan on Thursday afternoon, after customers primarily in Tokyo and Osaka lost connectivity at 1:39pm local time.
Reports in local media suggested that the affected areas covered significant patches of the main Honshu island, which includes greater Tokyo, Yokohama, Osaka, Nagoya and other major cities. In a message on its website, Softbank apologised to customers and said that it was “examining the cause” of the problem.
The outage struck less than two weeks ahead of the IPO of Softbank’s mobile business – a share issue that will be Japan’s largest in history and has been overwhelmingly pitched at retail investors.
Tokyo-listed shares in SoftBank fell as much as 6 per cent on Thursday amid a broader sell-off, touching their intraday low following reports of the service disruption.