Medica Publication Co., Ltd.

Companies / web services

Aliases / services: Medica Publication Co., Ltd. / 株式会社メディカ出版 / Medica出版株式会社
Official website: https://www.medica.co.jp/

Sources identifying the operating company

https://www.medica.co.jp/news/information/3544/

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

Response status by service

Medica ID and business contact records

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

The May 13, 2026 report attributes the March 13 ransomware intrusion to legitimate credentials. Without conclusive proof of extraction, it treats about 641,000 potentially duplicated people’s records as at risk because leakage cannot be excluded. Categories include Medica ID customers, medical/education contacts, authors, lecturers, business contacts and applicants. No secondary harm was confirmed as of May 12.

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

What users should do

Check individual communications and the official report; contact the official customer center if uncertain about coverage, even without a notification.

Official service URL

https://www.medica.co.jp/

Source URLs

2026-05-13 Official Medica ID and business contact records noticehttps://www.medica.co.jp/news/information/3544/Service and operation documentation

Related official sources

2026-05-13 Official Medica ID and business contact records noticeOfficial notice; link to this PHP incident unconfirmedConfirms scope, chronology and user guidance.