Type Incident
Data breach
GMO Internet Group faces ¥3.05 billion loss after data breach
1 source
At a glance
Low
30-day window, from the last update
Evidence-weighted, not popularity
Why Low
Low rather than Medium: UK relevance is 40 of 100, little UK-specific signal so far.
Briefing
There is no written leader briefing for this story yet. These questions come from the facts we hold.
Questions to ask IT
- Does this reporting name any supplier, product or service we rely on?
- Would our monitoring spot an attack like this, and who would we call if it did?
Next steps
- Confirm whether the affected organisation is a supplier or partner, and what contingency exists
No technical write-up beyond the summary below yet.
Next steps
- Check whether the affected organisation or service is in your estate or supply chain, and follow its guidance
Summary
- GMO Internet Group reports a ¥3.05 billion loss following a data breach.
Pulse
Last change 1h ago · Next recheck 13 Nov 2026, 11:23 UK time
- Story13 Nov 2026, 09:23 UK time · 1h ago
Linked reporting from Mezha.net (independent original reporter).
Read source (Mezha.net)
1 entry so far. The timeline chart appears once this story has more history.
Sources
- Mezha.netNews
GMO Internet Group faces ¥3.05 billion loss after data breach
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ClaimedHeadline60% confidence
GMO Internet Group faces ¥3.05 billion loss after data breach
- ProbableSummary fact75% confidence
GMO Internet Group faces ¥3.05 billion loss after data breach