Japan Cyber Incident Weekly Update — 9 November 2026

Public disclosures since the 3 November baseline

As of 09:00 JST on 9 November 2026, we identified 137 candidate cases and 48 follow-up or correction notices covering 44 cases. Of the 48 notices, 32 concern cases already in the baseline and 16 concern cases added this week. We held a further 17 notices for matching.

Source availability and counting

We retried 38 previously unavailable URLs. All 38 remained unavailable: 26 access denials, 10 pages not found, one rate limit and one timeout. These provisional counts are based on a public index. Multiple organisations may announce impacts from the same supplier incident. Full-text review of the underlying disclosures is ongoing.

Next to read

The IPA lists points of contact for affected organisations on its incident support page (Japanese).

References

JPCERT/CC Weekly Report, 5 November 2026 (Japanese).