Aflac Japan reports breach on 4.38 million customers, includes bank details

Financial watchdog orders insurance giant to report on cause, prevention steps

Aflac has a high market share in Japan in cancer and medical insurance, with a total of 13.5 million policyholders. (Photo by Kaisuke Ohta)

TOKYO -- Aflac Life Insurance Japan has suffered a data breach resulting in the leak of about 4.38 million customers' personal information, including some bank account details, leading to calls for policyholders to watch for suspicious transactions.