Ransomware incident at a consolidated subsidiary
DAINICHI COLOR VIETNAM CO., LTD. (the Company's local subsidiary in Vietnam)
Files on the subsidiary's data servers and computers, including financial and tax data, various reports submitted to government agencies, contract-related documents, and various documents relating to imports, exports and customs clearance
A vulnerability in the network that served as the intrusion route
Company response
Investigating the scope of the impact and other matters with the assistance of external experts
The Company will continue working to strengthen its measures, including rebuilding its information security framework and introducing high-security functions, while seeking to raise security awareness among all employees through ongoing education and training.
The impact of this incident on the performance of the Company's group is immaterial.
Measures to address the vulnerability in the network have been completed. Based on advice from external experts and other sources, the Company will continue strengthening its information security framework, introducing high-security functions, and providing ongoing education and training. Major operations, including manufacturing and shipments, will continue as normal.
| Item | Details |
|---|---|
| Event name | Ransomware incident at a consolidated subsidiary |
| Date of occurrence | 15 December 2025 (the date on which it was confirmed that files on the subsidiary's data servers and computers had been encrypted and could no longer be read) |
| Date recognized / date notice received | 15 December 2025 |
| Subject Entity | DAINICHI COLOR VIETNAM CO., LTD. (the Company's local subsidiary in Vietnam) |
| Target Locations / Products | Files on the subsidiary's data servers and computers, including financial and tax data, various reports submitted to government agencies, contract-related documents, and various documents relating to imports, exports and customs clearance |
| Cause | A vulnerability in the network that served as the intrusion route |
| Impact on Earnings Forecast | The impact of this incident on the performance of the Company's group is immaterial. |
| Investigation structure | Investigating the scope of the impact and other matters with the assistance of external experts |
| Measures to prevent recurrence | The Company will continue working to strengthen its measures, including rebuilding its information security framework and introducing high-security functions, while seeking to raise security awareness among all employees through ongoing education and training. |
| Outlook | Measures to address the vulnerability in the network have been completed. Based on advice from external experts and other sources, the Company will continue strengthening its information security framework, introducing high-security functions, and providing ongoing education and training. Major operations, including manufacturing and shipments, will continue as normal. |
Items this document does not state (15)
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.The Company cites a vulnerability in the network that served as the intrusion route for the ransomware.