Excerpt from TechRadar, Published on October 29, 2026
Sony Network Communications, a Japanese subsidiary of Sony Group, has disclosed a data breach affecting approximately 2.58 million customer records associated with its So-net and plala internet services. The incident exposed personal information and certain email account credentials, prompting an investigation into the unauthorized access.
According to TechRadar, an unauthorized party accessed Sony Network Communications’ So-net member database on October 19, 2026. The company detected the intrusion on October 23, shut down the affected server, and blocked further communication with the source. Its investigation subsequently confirmed that customer information had been extracted.
The exposed information includes names, phone numbers, email addresses, user IDs, dates of birth, gender, and internet connection IDs. The breach also affected email accounts across selected So-net services, exposing their email passwords. Additionally, 16 records containing bank account information and seven password-reset notification records were compromised. Sony clarified that regular So-net and plala membership passwords were not exposed, except for the seven affected password-reset records. Credit card information was also not involved in the incident.
Sony Network Communications reset the affected email passwords on October 27 and reported the incident to Japan’s Personal Information Protection Commission. The company is continuing its investigation into the cause and scope of the breach.
The company warned that exposed personal information could be exploited for fraudulent emails, text messages, and phone calls. It advised customers to remain cautious of suspicious communications, particularly messages containing unfamiliar links or attachments. The incident specifically concerns Sony’s So-net and plala internet services in Japan. It does not indicate a breach of PlayStation Network accounts.
For additional information, read the original report from TechRadar.
