Incidents on Sep 28, 2026

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Incidents on Sep 28, 2026
Date	Target	Summary	Classification	Source links
Sep 28, 2026 LEAK-098	Shueisha Inc. (HAPPY PLUS COMMUNITY)	C 2,835 peopleThe bloggers' information management system was accessed without authorization on September 9, 2026; information on 2,835 registrants, 11,237 sent emails and a 10,780-entry client list may have been viewed or obtained, and a leak was determined.	Unauthorized access & data leakConfirmedOfficial statement	shueisha.co.jp itmedia.co.jp
Sep 28, 2026 LEAK-081	Shinano Mainichi Shimbun "Shinano Mainichi Shimbun Digital"	Unauthorized access from outside to the Shinmai point exchange system of "Shinano Mainichi Shimbun Digital" was found on September 7, and some history data was temporarily erased. No leak of personal information has been confirmed, the data has been restored, and point balances were not affected.	Tampering & unauthorized operationConfirmedOfficial statement	nano.shinmai.co.jp scan.netsecurity.ne.jp

Incidents on Sep 28, 2026