Bookoff Group Holdings Limited
Apology and Notice Regarding Personal Information Leakage Due to Unauthorized Access (Second Report)
A subsidiary of Bookoff Group confirmed in a second report that unauthorized access to the membership management system resulted in the external acquisition of some member information. Approximately 6,380,000 members are affected. Credit card information and similar data are not included. At present there is no impact on financial results; recurrence-prevention measures and an external expert investigation are ongoing. Revision of earnings guidance is undecided.
Key Figures
- Number of member data records leaked: 6,427,735 cases
- Number of affected individuals: 6,383,279 people
- Scope of impact: App members, online store members, and web members are affected
AI要約
Overview and Facts
In the second report regarding the unauthorized access announced on October 9, 2026, it was confirmed that a third party accessed Bookoff Corporation's membership management system and obtained member information externally. The leaked data pertains to app members, online store members, and web members, and does not include credit card information or the like. Countermeasures against the attack origin have been completed and all systems are operating normally. The cause investigation is being conducted together with external experts, recurrence-prevention measures are being implemented, and detailed information will be withheld from public disclosure.
Impact and Future Response
The impact on results for the cumulative consolidated first quarter period is currently unknown, but at this time it has not been factored into the consolidated earnings forecast for the fiscal year ending May 2027. A report has been submitted to the Personal Information Protection Commission, and investigations are being advanced in cooperation with the police. Additional security measures and recurrence-prevention actions will be implemented, and if revisions to earnings forecasts occur they will be announced promptly.
Bookoff Group Holdings Limited
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