MediumData breachActive
Osaka city online services hit by Arara mail-service breach, over 1.07 million user emails leaked
Osaka City said in its Nov 13 final report that an external mail-delivery service used by its administrative online system was accessed without authorization, confirming 1,078,713 user email addresses leaked, covering addresses that received system emails between Jul 1 and Oct 31, 2026 .