Kyoei Fire & Marine Insurance Co., Ltd.

Companies / web services

Aliases / services: Kyoei Fire & Marine Insurance Co., Ltd. / 共栄火災海上保険株式会社 / 共荣火灾海上保险株式会社
Official website: https://www.kyoeikasai.co.jp/

Sources identifying the operating company

https://www.kyoeikasai.co.jp/info/info20260512.pdf

Each response applies only to its stated service scope. “Not listed” does not mean unpatched or unaffected.

Response status by service

Outsourced loss adjustment for claims

Response status: Not listed
Response information checked: 2026-10-30

Current re-audit: Related incident verified; PHP connection not stated · Research date: 2026-10-30

On May 12, 2026, Kyoei reported that 31 outsourced loss-adjustment records may have leaked in a ransomware incident discovered by Shin Nihon Kentei Kyokai on November 26, 2025. Potential fields included policy/claim numbers, names, birth dates and contact details, but not bank accounts or My Number identifiers. No misuse had been confirmed.

Scope: A PHP connection and response to the current PHP vulnerabilities are not listed.

What users should do

Review any individual notification and contact the insurer through its official channels. The vendor’s overall incident scope is separate from this insurer’s 31 records.

Official service URL

https://www.kyoeikasai.co.jp/

Source URLs

2026-05-12 Official Outsourced loss adjustment for claims noticehttps://www.kyoeikasai.co.jp/info/info20260512.pdfService and operation documentation

Related official sources

2026-05-12 Official Outsourced loss adjustment for claims noticeOfficial notice; link to this PHP incident unconfirmedConfirms scope, chronology and user guidance.