Japan Studio web tool data breach

A security breach involving the external web production tool ‘Studio’ has led to the potential leakage of personal information across several Japanese entities. The breach originated from unauthorized access to a cloud environment used by the service.

Japan’s Digital Agency reported that the incident may have compromised data from up to 13,323 inquiries submitted between May 2021 and March 2023. This information includes names, email addresses, and inquiry details related to COVID-19 vaccination apps, recruitment, and other services. Additionally, the personal details of 35 agency staff or contractors may have been exposed.

Akatsuki Inc. also confirmed that the breach, occurring between September 30 and October 1, 2026, potentially exposed the names, email addresses, phone numbers, and company details of up to 2,884 individuals. Akatsuki stated that sensitive financial data and resume files were not compromised. Both the Digital Agency and Akatsuki Inc. have advised the public to remain vigilant against suspicious communications.