Resona Bank said Tuesday that its internet banking service for individual clients has come under its second suspected cyberattack in recent days.

The bank said transactions were suspended at around 5:30 p.m., indicating that it may be the victim of a distributed denial-of-service, or DDoS attack, in which networks are overwhelmed by data from multiple sources over a short period.

The move comes after the bank experienced a similar cyberattack late last year, before restoring its internet banking services. During the previous disruption, Resona Bank confirmed no customer information was inappropriately accessed.

A slew of Japanese companies, including Mizuho Bank and Japan Airlines, have allegedly come under DDoS attacks recently.

"We apologize for the inconvenience this has caused," Resona Bank said.