Sony Bank Suspends Digital Securities Trading After 621 Customers Affected

Sony Bank suspended transactions in its digital securities service after unauthorized access at service provider Securitize Japan exposed personal information tied to 621 customers; the incident was detected Oct. 29.

Four customers had names, addresses, birth dates and account numbers exposed. The other 617 had their names exposed.

Securitize Japan detected a system abnormality on Oct. 29 and confirmed unauthorized external access that day before notifying Sony Bank. A review of system logs confirmed the customer data exposure.

Sony Bank found no improper transactions linked to the incident and no evidence that the exposed information had been posted or spread online. The bank plans to contact affected customers individually.

The suspension applies only to the digital securities service. Sony Bank will issue a separate notice when transactions resume.

Securitize’s broader business includes tokenized U.S. stock entitlements tied to 12 companies, with initial trading on Solana through its registered broker-dealer platform.