Sumitomo Mitsui Banking Corp. said Thursday that 32 cases of phishing since June 11 have caused its customers a total of 27 million yen in losses.
E-mails disguised as correspondence from the bank prompted customers to input identification numbers and passwords on a fake website after the introduction of a new security system, according to the bank.
The bank, a unit of Sumitomo Mitsui Financial Group Inc., was subjected to similar phishing practices in October last year.
The bank is calling on its customers via e-mail and its website to be on alert for such scams.