Incidents on Sep 1, 2026

Publication date: Dates are source publication dates (JST), not occurrence dates.

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Incidents on Sep 1, 2026
DateTargetSummaryClassificationSource links
LEAK-049Mitsui Fudosan Co., Ltd.B Up to 36,000 recordsUnauthorized access was confirmed on August 28, and information in some systems may have been viewed using misused credentials. Up to 19,000 records of officers and employees (names, email addresses and so on) and up to 36,000 records of outside parties (email addresses and display names) are covered. No leak of business information or passwords has been confirmed.
Unauthorized access & data leakPossibleOfficial statement
LEAK-060Chiba Prefecture "Inochi no Nigiwai Chosadan" (Biodiversity Center website)C 1,963 peopleOn the Biodiversity Center website, the page managing names, addresses, phone numbers and other data of 1,963 survey-team members was accessed without authorization, and a page not normally linked was inserted in the early hours of August 27. The site is offline, no leak has been confirmed so far, and an investigation will be carried out.
Unauthorized access & data leakUnder investigationOfficial statement
LEAK-127TRUNK Co., Ltd.D 424 recordsAn employee's email account was accessed without authorization, and 424 records including names, addresses, email addresses and workplaces were leaked externally. The third party also used the account to send suspicious emails impersonating the company and its employee.
Unauthorized access & data leakConfirmedOfficial statement
Incidents on Sep 1, 2026