Privacy Unpacked

Confirmed breach

GMO Internet Group data breach

JPJapan · GMOインターネットグループ

Yahoo!ニュース, العربية and Межа reported a data breach at GMO Internet Group (Japan) on 26 October 2026, and it has been confirmed. Exposed: Passwords and logins, Phone numbers, Dates of birth, Names, Addresses and Account information.

Status
Confirmed breach
People affected
Not reported yet
Reported
26 October 2026
Who is affected
Japan

What was exposed

  • Passwords and logins
  • Phone numbers
  • Dates of birth
  • Names
  • Addresses
  • Account information

How it happened

How
Hacking サーバーが不正アクセスを受け source
Way in
Onamae хмарного сервісу віртуальних робочих столів Onamae source
Attacker
不正アクセス 攻撃者とみられる者が開設したサイト source

Sources

If GMO Internet Group had your data

  1. Look for GMO Internet Group’s own notice or letter: it should say what of yours was involved. Keep it.
  2. Change your GMO Internet Group password, and the same password anywhere else you use it. Turn on two-step sign-in.
  3. Expect scams that use your details: calls, texts or emails pretending to be GMO Internet Group, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

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  1. Bandai Logistics PalreportedJPJapan · 27 October 2026 Phone numbersNamesAddresses+1 –not reported
  2. Sony Network CommunicationsJPJapan · 27 October 2026 Financial account and card detailsPasswords and loginsEmail addresses+3 2.6Mcustomer records
  3. JoshinJPJapan · 26 October 2026 Passwords and loginsPhone numbersNames+6 6.2Mrecords
  4. JR EastJPJapan · 26 October 2026 Email addressesNames 170Krecords
  5. Rakuten TravelJPJapan · 26 October 2026 Financial account and card details 2.6Mcustomers

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From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Found a mistake? Tell us and we correct it.