# Yamato discloses 5.31 million compromised records; Park24 changes retention rules

_Published Sunday, October 18, 2026 at 7:17 AM EDT · Security · Latest · Tier 2 — Notable_

![Yamato discloses 5.31 million compromised records; Park24 changes retention rules — Primary](https://www.adnkronos.com/assets/themes/desktop/images/adnkronos-share.jpg)

Yamato Transport said on Oct. 16 that a previously announced breach compromised 5.31 million sets of personal information belonging to some deferred-payment service users, Jiji Press reported. Nikkei separately disclosed about 1.83 million compromised sets of personal information after unauthorized access to a cloud service used for system development.

Park24 said it would finish deleting identity-document images by the end of October and revise its rules to delete them immediately after identity verification. About 1.6 million of the approximately 6.6 million sets of personal information affected in the attack on its Times Car operator included images of driver's licenses and other documents.

## Sources

- [Adnkronos](https://www.adnkronos.com/internazionale/akieng/more-japanese-firms-disclose-details-of-data-breaches_5CGzYXz3JfP5WTdMxBRCat)

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Canonical: https://techandbusiness.org/newswire/ls_wfXG467g0jEqs7yCqPo
Published: 2026-10-18T11:17:59.981Z
Story chronology: 2026-10-16T12:47:19.000Z
Retrieved: 2026-10-18T13:38:22.740Z
Publisher: Tech & Business (techandbusiness.org)