Chiiki Shosha Yamaguchi security incident history
Hacking, data breaches and other security incidents involving Chiiki Shosha Yamaguchi, with related coverage.
Incidents: 1 · Most recent
Yamaguchi FG subsidiary Chiiki Shosha Yamaguchi leaks 3,287 email addresses
3.3kImpact: 3,287 member email addresses leaked
Yamaguchi Financial Group said unauthorised access to an outsourced email distribution service used by an e-commerce site run by its subsidiary Chiiki Shosha Yamaguchi had exposed members’ email addresses. The leak took place between 1 July and 28 October 2026 and involved 3,287 email addresses. Email addresses are the only information confirmed to have been leaked so far, and affected members will be contacted individually.
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