Risk of service outages caused by external attacks on servers
First written in FY2016. 6 of 13 entries say "Restated". Latest entry: FY2026.
MKSystem moved to the "Worse" side of this theme in 2023, 2 years before the typical company in this theme (2025).
The whole theme swung hardest in 2026: 20 of 89 companies on the "Worse" side.
8 other companies' latest entry also says "Worsened".
- FY2026WorsenedAnnual report
「Cyberattacks are becoming increasingly sophisticated and complex each year, and represent a serious threat that could have a significant impact on business continuity and customer trust.」
In addition to its previous risk awareness based on past attacks, the Company explicitly identifies the increasing sophistication and complexity of cyberattacks and their potentially significant impact on business continuity and customer trust. - FY2026-H1RestatedAnnual report
「The filing states that, during the interim consolidated accounting period, there were no material changes in the major risks that management recognizes could materially affect the consolidated companies' financial position, operating results or cash flows, or in the matters described under Business Risks in the securities report for the previous fiscal year.」
The Company states that there have been no significant changes to its existing key risks. - FY2025RestatedAnnual report
「The Group has previously experienced cyberattacks from external sources and, on those occasions, carried out appropriate investigations and thoroughly implemented measures to prevent recurrence.」
The Company discloses that it has previously experienced cyberattacks from external sources and continues to conduct investigations and implement measures to prevent recurrence. - FY2024RestatedAnnual report
「In response to the unauthorized third-party access via ransomware to servers in the Group's data center on 5 June 2023, we continue to take necessary measures, including conducting a thorough fact-finding investigation to identify the cause, working to prevent the damage from spreading, and implementing measures to prevent recurrence.」
The Company continues to disclose the actual occurrence of an external attack and the ongoing efforts to identify the cause, prevent the damage from spreading, and implement measures to prevent recurrence, including in its full-year disclosures. - FY2024-Q3MaterialisedAnnual report
「In the Sharo-mu business, as described above, servers at the data center providing the service were subject to unauthorized third-party access via ransomware, leaving the Company unable to provide normal service to most of the approximately 3,400 users covered by its services. In response, the Company suspended billing for June usage and part of July usage by affected users, resulting in lower revenue.」
The effects of the unauthorized access via ransomware continued, resulting in the inability to provide service to most of the approximately 3,400 users and the suspension of billing for June usage and part of July usage. - FY2024-Q2MaterialisedAnnual report
「As a result, the system went down and the Company became unable to provide normal service, so it suspended billing for June usage and part of July usage for affected users.」
The effects of the unauthorized access via ransomware continued, resulting in service outages and the suspension of billing for June usage and part of July usage. - FY2024-Q1MaterialisedAnnual report
「In the Sharo-mu business, as described above, servers at the data center providing the service were subject to unauthorized third-party access via ransomware, leaving the Company unable to provide normal service to most of the approximately 3,400 users covered by its services. In response, the Company suspended billing for June usage by affected users, resulting in lower revenue.」
The unauthorized access disclosed in the previous fiscal year resulted in service outages for most of the approximately 3,400 users and the suspension of billing for June usage. - FY2023MaterialisedAnnual report
「As stated in the timely disclosure filed on 6 June 2023, in response to unauthorized third-party access via ransomware to servers in the data center operated within the Group, we continue to take necessary measures, including conducting a thorough fact-finding investigation to identify the cause, working to prevent the damage from spreading, and implementing measures to prevent recurrence.」
The external attack risk previously disclosed as a possibility materialized as unauthorized third-party access via ransomware to servers in the data center. The Company continues to identify the cause, prevent the damage from spreading, and implement measures to prevent recurrence. - FY2022RestatedAnnual report
「Internet-based server attacks have become increasingly sophisticated and commonplace, posing a significant threat to the conduct of the Group's business. If the Group's servers become the target of an external DoS attack, the provision of the Group's services may be affected.」
The increasing sophistication and prevalence of server attacks and the potential impact of DoS attacks on service provision continue to be disclosed. - FY2020RestatedAnnual report
「Internet-based server attacks have become increasingly sophisticated and commonplace, posing a significant threat to the conduct of the Group's business. If the Group's servers become the target of an external DoS attack, the provision of the Group's services may be affected.」
The increasing sophistication and prevalence of server attacks and the potential impact of DoS attacks on service provision continue to be disclosed. - FY2018RestatedAnnual report
「Internet-based server attacks have become increasingly sophisticated and commonplace, posing a significant threat to the conduct of the Group's business. If the Group's servers become the target of an external DoS attack, the provision of the Group's services may be affected.」
The increasing sophistication and prevalence of server attacks and the potential impact on service provision continue to be disclosed as significant risks. - FY2017WorsenedAnnual report
「In recent years, internet-based server attacks have become increasingly sophisticated and commonplace, posing a significant threat to the conduct of the Group's business.」
The Company has heightened its risk awareness regarding external attacks, which have become increasingly sophisticated and commonplace and now pose a significant threat to business operations. - FY2016First statedAnnual report
「Large-scale, organized attacks involving state agencies are no longer unrealistic. If our servers were to become the target of such an organized attack, it is unclear whether we could defend against it, and if this threat were to materialize, we might be unable to provide our principal product, internet services.」
The risk of service outages caused by DoS attacks and other threats is disclosed in connection with the Company's business model of providing internet services.