Japan's H2O Retailing and its subsidiary Hankyu Hanshin Department Stores said on October 19 that a third party gained unauthorized access to the customer management system via the department stores' booking site on October 16, and that unauthorized access was also found the next day on the official shopping site HANKYU HANSHIN E-STORES and on Remo Order, after which the company shut the sites down [1]. The company says part of the personal data of nearly all of about 1.26 million H2O ID members leaked, including names, gender, email addresses, postal codes, addresses, mobile and landline numbers, age and date of birth; its October 30 second report also confirmed that 6,243 booking-form entries leaked, while no leak of customer data from the shopping sites was confirmed [1][2][3]. H2O ID members should beware of suspicious emails, SMS and calls impersonating the company sent to their registered email or phone, avoid unknown URLs, and note that the company only sends notices from noreply@h2o-retailing.co.jp [1].
Intruders reach Hankyu Hanshin Department Stores' customer system via its booking site, exposing names, addresses, phone numbers and birth dates of nearly all of about 1.26 million H2O ID members
1 min read
- Disclosed
- Oct 19, 2026
- Occurred
- Oct 16, 2026
- Published
- Nov 11, 2026
- Last updated
- Nov 11, 2026
- Scale
- 1,260,000 records[1]
- CVSS basis
- Our assessment
- Technology
- Attack vector
- Impact
- Data type
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Retail
What to do nowOur advice
Timeline
Technical details
Remediation
Vendor guidance
- 1Watch for impersonation mitigate[1]
Watch for suspicious emails, SMS and calls to registered contacts and avoid unknown URLs; company notices only come from noreply@h2o-retailing.co.jp.
References
Official / primary2
- [1]
“その後の調査により、10 月 19 日(月)に、当該顧客管理システムで管理している「H2O ID」のうち、約 126 万件の個人情報の一部が漏えいしたことが判明しました。”
- [2]エイチ・ツー・オー リテイリング株式会社2026-10-30Accessed 2026-11-10
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