Casio has reported a significant data breach resulting from a ransomware attack on October 5, with personal information of nearly 8,500 individuals compromised. The Underground ransomware gang claimed responsibility, stealing over 200 gigabytes of data. The breach affected approximately 6,500 employees and included sensitive information such as names, employee numbers, and ID details. Additionally, the personal data of over 1,900 business partners and 91 customers was accessed. Casio confirmed that no credit card information was exposed and that affected services are gradually coming back online.