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GMO Makeshop
Tokyo, Japan1 source
Confirmed:Confirmed by the organisation, a regulator or a securities filing. First reported 5 Nov 2026.
GMO Makeshop reports 12.6 million email addresses leaked via AraRa supply chain
GMO Makeshop confirmed that shop member and order email addresses were leaked via the AraRa email distribution service. The scope involves approximately 12.6 million records.
- Type
- Data breach
- Sector
- Technology
- Records
- 12.6M records claimed
- First reported
- 5 Nov 2026
- Latest source
- 5 Nov 2026
What to do
- If you have an account, change that password, and anywhere you reused it.
- Turn on two-factor authentication, ideally an authenticator app or passkey, not SMS.
- Expect phishing that uses your real details. Do not click links in messages about this incident; go to the company's site directly.
- If payment cards were involved, watch statements and ask your bank for a new card.
- If government ID or social security numbers were involved, consider a credit freeze.
- If this is a vendor of yours, ask what of your data they held and whether it was in scope.
- Reset any API keys, SSO trusts or shared credentials you have with them.
- Brief your help desk: attackers often impersonate the breached brand next.
Not sure? Ask an assistant with the sources attached, or have a coding agent check your systems.
Check your systems for GMO Makeshop
Sources
1Confidence 70% that this is real and correctly placed. Locations are city centroids at best. Spotted an error? Report a correction.