How much is GMO setting aside for customer compensation?

It has received about ¥54 million in requests for the flat ¥5,000 goodwill payment as of Nov 12, with a maximum of ¥130 million. It has also accepted about ¥2.998 billion in claims for losses from fraudulent transactions.

Is there a reward for information leading to an arrest?

Yes. GMO Internet Group has offered a total of $1 million (about ¥160 million) for information leading to the arrest of the perpetrators, though the payout amount is undecided.

What security measures is GMO taking?

A group-wide emergency audit by white-hat teams from GMO Cybersecurity by Ierae and GMO Flatt Security is set to finish by Nov 14. The group is also preparing checks using frontier AI from OpenAI, Anthropic and Google.

日経クロステック23h agoNov 13, 2026, 19:01 JST

GMO Internet Group flags 約30.5億円 hit from cloud breach

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3 Key Points

What happened
GMO Internet Group said it expects a roughly ¥3.05 billion earnings impact in Q4 2026 from the breach of Onamae.com Desktop Cloud. It has received about ¥54 million in 5,000-yen goodwill payments requests, potentially reaching ¥130 million, and ¥2.998 billion in fraudulent-transaction claims.
Why it matters
CFO Masafumi Yasuda said the amount is based only on declared claims and will be finalized after verification. The group is also preparing a security audit using frontier AI from OpenAI, Anthropic and Google, completed by Nov 14.

WHO IT HITSThe breach lands hardest on GMO Internet's cloud customers, who face data exposure, and on its finance team, which must finalize compensation figures after verifying claims.

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FAQ

How much is GMO setting aside for customer compensation?: It has received about ¥54 million in requests for the flat ¥5,000 goodwill payment as of Nov 12, with a maximum of ¥130 million. It has also accepted about ¥2.998 billion in claims for losses from fraudulent transactions.
Is there a reward for information leading to an arrest?: Yes. GMO Internet Group has offered a total of $1 million (about ¥160 million) for information leading to the arrest of the perpetrators, though the payout amount is undecided.
What security measures is GMO taking?: A group-wide emergency audit by white-hat teams from GMO Cybersecurity by Ierae and GMO Flatt Security is set to finish by Nov 14. The group is also preparing checks using frontier AI from OpenAI, Anthropic and Google.

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