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

Source: [The Record from Recorded Future News](https://therecord.media/city-of-osaka-japan-email-data-breach) · 2026-11-13 · Security
Page: https://themorning.dev/story/city-of-osaka-warns-of-data-breach-impacting-1-million-as-japan-reels-from-dozen-810ecd44c3ac2c42
Kind: security · Impact: high

## In brief

- The City of Osaka warned of a data breach affecting 1 million people.
- Residents of the city, which has 2.8 million, were told to be wary of suspicious emails purporting to come from the local government.
- The source reports that Japan is dealing with dozens of cyber incidents.

## Why it matters

Emails impersonating a government body can be used for phishing, so staff and users who receive unexpected government emails should verify them before acting.

## What to do

- Treat suspicious emails that claim to come from the City of Osaka with caution.

## Timeline

- 2026-11-13: City of Osaka warns of data breach affecting 1 million residents

## Coverage

- [City of Osaka warns of data breach impacting 1 million as Japan reels from dozens of cyber incidents](https://therecord.media/city-of-osaka-japan-email-data-breach) — The Record from Recorded Future News, 2026-11-13

Tags: data-breach, phishing, osaka, japan, government

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Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Dev – https://themorning.dev