Monex: account opening paused as a precaution after attempted unauthorized access

On October 20, Monex suspended new general securities account applications as a precaution after traces of attempted third-party access were found in an account-opening system managed by an external contractor. The pause covers new applications through its website, app and related channels, with reopening planned after safety verification. The announcement describes an access attempt and precautionary suspension; it does not confirm successful intrusion or data exfiltration.

Every organization listed paused its services as a precaution; none is listed as hit.