Leakage of Personal Information Resulting from Unauthorized Access by a Third Party to the Company's Yakiniku King Official App Member Management System
The Monogatari Corporation (the Company)
Yakiniku King official app member management system
Unauthorized access by a third party. The details of how the unauthorized access became possible are under investigation.
Company response
No services suspended. The Yakiniku King official app remains available.
대응 is being handled with the cooperation of the development company and related companies. The establishment of a third-party committee or similar body is Not disclosed.
Further strengthening of security measures and monitoring systems
Related procedures
Necessary measures, including reporting to the Personal Information Protection Commission and filing a damage report with the police
Personal Information Protection Commission and police
The impact of this matter on the business performance of the Company group is currently under assessment. If any matters requiring disclosure arise, they will be disclosed promptly.
The investigation will continue, and security measures and monitoring systems will be further strengthened. Necessary measures, including reporting to the Personal Information Protection Commission and filing a damage report with the police, will be pursued.
If new facts come to light as the investigation progresses, they will be disclosed promptly. Any matters requiring disclosure will also be disclosed promptly.
| Item | Details |
|---|---|
| Event name | Leakage of Personal Information Resulting from Unauthorized Access by a Third Party to the Company's Yakiniku King Official App Member Management System |
| Date of occurrence | Friday, 2 October 2026 |
| Date recognized / date notice received | 3 October 2026 (Saturday) (date the leakage of member information was confirmed) |
| Subject Entity | The Monogatari Corporation (the Company) |
| Target Locations / Products | Yakiniku King official app member management system |
| Cause | Unauthorized access by a third party. The details of how the unauthorized access became possible are under investigation. |
| Impact on Earnings Forecast | The impact of this matter on the business performance of the Company group is currently under assessment. If any matters requiring disclosure arise, they will be disclosed promptly. |
| Type of litigation or proceeding | Necessary measures, including reporting to the Personal Information Protection Commission and filing a damage report with the police |
| Court or authority | Personal Information Protection Commission and police |
| Suspended operations | No services suspended. The Yakiniku King official app remains available. |
| Investigation structure | 대응 is being handled with the cooperation of the development company and related companies. The establishment of a third-party committee or similar body is Not disclosed. |
| Measures to prevent recurrence | Further strengthening of security measures and monitoring systems |
| Outlook | The investigation will continue, and security measures and monitoring systems will be further strengthened. Necessary measures, including reporting to the Personal Information Protection Commission and filing a damage report with the police, will be pursued. |
| Planned follow-up disclosure | If new facts come to light as the investigation progresses, they will be disclosed promptly. Any matters requiring disclosure will also be disclosed promptly. |
Items this document does not state (11)
These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.
The reasons the company gives
The company's own explanation, not something inferred from the numbers.Unauthorized access by a third party. The details of the cause, including how the unauthorized access became possible, are under investigation.