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Incidents on Aug 28, 2026

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

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Incidents on Aug 28, 2026
DateTargetSummaryClassificationSource links
LEAK-005kindalA 136,464 peopleA staff account on the EC platform was accessed without authorization after its credentials were stolen by phishing, and customer information was bulk-exported twice on August 23, 2026. Data of 136,464 customers, including names, addresses and email addresses, may have been leaked.
Unauthorized access & data leakConfirmedOfficial statement
LEAK-093Treasure Factory Co., Ltd. (subsidiary Kaindoru)A 136,464 peopleA staff account on the e-commerce platform used by the subsidiary Kaindoru's online store was accessed without authorization on August 22, 2026, and customer data was bulk-exported. 136,464 customers are affected.
Unauthorized access & data leakConfirmedOfficial statement
LEAK-126CoronaB Up to 35,000 peopleA third party accessed an external cloud service used to manage construction information, and names, addresses and construction-related documents of up to 35,000 customers may have been leaked. It came to light on August 24, 2026, through information from a third party.
Supply chainPossibleOfficial statement
LEAK-056Co-op Yamaguchi "Co-op Yamaguchi LINE Mini App"On August 27, 2026, a third party gained unauthorized access to the database of the LINE mini app, which is operated by an outsourced vendor, and all data was deleted. Service was restored from backup the same day, and the cooperative says it cannot rule out leakage of names, addresses, phone numbers and email addresses.
Unauthorized access & data leakPossibleOfficial statement
LEAK-058Shizugin TM SecuritiesUnauthorized access to customers' securities accounts and unauthorized trades, believed to stem from phishing and similar methods, were confirmed. For losses where third parties traded securities using customers' assets, the firm plans to examine each case and provide certain compensation according to individual circumstances.
Tampering & unauthorized operationConfirmedOfficial statement
Incidents on Aug 28, 2026