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Apexward Pulse
Type Incident

Data breach

City of Osaka warns of data breach impacting 1 million as Japan reels from dozens of cyber incidents

2 sources

At a glance

Low
30-day window, from the last update
Evidence-weighted, not popularity
Why Low

Low rather than Medium: exposure is scored at a default because we cannot see your systems or suppliers. If it touches your systems or suppliers, treat it as Medium.

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

  1. Confirm whether the affected organisation is a supplier or partner, and what contingency exists

Summary

  • The City of Osaka warned 2.8 million residents about suspicious emails claiming to be from local government authorities.
  • A data breach affecting 1 million people has been reported in Osaka, Japan, amid multiple cyber incidents across the country.

Read the original reportThe Record from Recorded Future News(opens in a new tab)

3 reports

Part of Japan's SiteGuard WAF flaw exploitation

Pulse

Last change 2h ago · Recheck overdue since 13 Nov 2026, 23:32 UK time

  1. Story13 Nov 2026, 21:03 UK time · 2h ago

    Linked reporting from The Record from Recorded Future News (independent original reporter).

    Read source (The Record from Recorded Future News)
  2. Story13 Nov 2026, 21:32 UK time · 2h ago

    Linked reporting from The Record (independent original reporting).

    Read source (The Record)

2 entries so far. The timeline chart appears once this story has more history.

Sources

How we know

Statements extracted from sources. Higher confidence means stronger corroboration.

  • ClaimedHeadline60% confidence

    City of Osaka warns of data breach impacting 1 million as Japan reels from dozens of cyber incidents

  • ProbableSummary fact75% confidence

    Osaka, Japan's third-largest city, told its 2.8 million residents to be wary of suspicious emails purporting to come from the local government.