Email addresses of 240 Ninohe card collection applicants potentially exposed
The City of Ninohe said users' email addresses may have been exposed following unauthorised access in October 2026 to Arara Message, the external email delivery service used by its My Number Card collection booking system. The potentially affected group comprises 240 people who entered their email addresses to receive booking confirmation emails between 1 August 2022 and 25 October 2026. The city said the actual scope and number of exposures remain under investigation, and that individual My Number identification numbers were not exposed because the system does not use them.
Key facts
- Affected organisation
- City of Ninohe
- Incident type
- Hacking & intrusion
- Occurred / detected
- 2026-10-28
- Scale of damage
- Possible exposure of email addresses belonging to 240 booking users (actual scope and number of exposures under investigation)
- Cause / method
- Unauthorised access to the My Number Card collection booking and management system
- Location
- Japan
Timeline
- Unauthorised access to the My Number Card collection booking and management system used by the City of Ninohe, and the possible exposure of email addresses, became known.
1 related reports
The summary and key facts are written by AI from related reports and may contain errors. Check the original articles and the organisation’s official statements for accurate details.