1
Published signals
currently linked to this company
Company intelligence
Kyuden cybersecurity incidents and threat signals
kyuden.co.jp
This company page brings together public reporting currently associated with Kyuden. It reflects signals published by Shadow Tier and should not be read as a complete incident history.
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Last 28 days
recent published signals
1
Last 90 days
recent published signals
0
High or critical
confidence classifications
June 25, 2026
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most recent published signal
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Based on all published signals currently linked to Kyuden. Affected countries come from victim data; the company country above remains a separate profile fact. Counts describe this reporting set, not overall incident prevalence.
Confirmed impacts
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All published signals involving Kyuden
Kyushu Electric Power Co. Discloses Data Breach Affecting Over 10 Million Customers
On June 12, 2026, Kyushu Electric Power Co., Inc., a Japanese energy firm, disclosed a physical security incident involving the loss of a drive containing unencrypted private data for more than 10 million customers. The incident highlights data protection failures beyond cyberattacks and is expected to trigger regulatory scrutiny and erode public trust due to the scale of exposed unencrypted customer Personally Identifiable Information (PII).
FAQ
Questions about Kyuden cybersecurity reporting
What does the Kyuden page include?
It combines a reviewed organization profile with all current published Shadow Tier signals explicitly linked to Kyuden.
Does every mention of Kyuden appear here?
No. A signal must contain a reliable company connection and meet the publication criteria; incidental or ambiguous mentions are excluded.
Why can the incident count change?
The page follows current published reporting. Counts change as new evidence is added, classifications are reviewed, or older signals leave the reporting window.