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Reported breach

NTT Data data breach

JPJapan · NTTデータ

朝日新聞デジタル reported a data breach at NTT Data (Japan) on 31 October 2026. It affected 362 records.

People affected
362records
Reported
31 October 2026News report
Who is affected
Japan

What was exposed 3

  • Dates of birth
  • Names
  • Purchase amounts

How it happened

How
Hacking there was unauthorized access in the service of the outsourced software company source
Our translation from Japanese委託先のソフトウェア企業のサービスで 不正アクセス があり
Way in
A software company contractor in the service of the outsourced software company source
Our translation from Japanese委託先のソフトウェア企業のサービスで

Sources 1

News reports are read by an AI model; every fact taken from an article was checked word for word against it, and anything it could not find was dropped. · Corrections and changes

Organisations breached through NTT Data

1 breach at NTT Data’s customers or partners, each named in a source. The NTT Data breach (2026) →

  1. Rakuten SecuritiesreportedCountry being checked · 1 November 2026 Social Security numbersNamesAddresses+1 362records
    Unauthorized access to NTT Data contractor system received tokyonewsmedia
    Our translation from JapaneseNTTデータ委託先システムへの不正アクセス受け

More breaches in Japan

  1. GMO Global SignreportedJPJapan · 1 November 2026 Email addressesNames 45Kpeople
  2. GMO subsidiaryreportedJPJapan · 1 November 2026 ID management service data 45Kpeople
  3. BK JapanreportedJPJapan · 1 November 2026 Email addressesPhone numbersDates of birth+3 11.2Maccounts
  4. Club TourismreportedJPJapan · 31 October 2026 Email addressesPhone numbersNames+1 4.3Mrecords
  5. All Nippon AirwaysreportedJPJapan · 30 October 2026 Passport numbersPhone numbersNames+5 37.8Kcustomers

Every breach in Japan →

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 · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.