GMO hackers' website goes offline after threats to release personal data

The Japanese report points to possible action by a US provider, while Tokyo police investigate the cyberattack.

JapanStory of October 29, 2026Trari Newsroom

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【速報】GMOに対するハッカー集団サイトが停止　米プロバイダーによる措置か　警視庁が不正アクセス禁止法違反などの疑いで捜査｜TBS NEWS DIG

A website used by hackers demanding ransom from Japan's GMO Internet Group has become inaccessible, interrupting the site through which they threatened to publish more personal information.

Japan's TBS NEWS DIG Powered by JNN reports that multiple cybersecurity experts confirmed the website could no longer be reached. The broadcaster says a US provider is believed to have suspended it after judging its content inappropriate, but does not present that explanation as confirmed.

According to the report, the attackers had gained unauthorized access to services run by the Japanese internet conglomerate. They then published information believed to concern users and threatened to release more every day at noon unless GMO paid a ransom.

GMO separately announced that the attackers' website domain had been suspended. The company said it had been working with relevant service providers and would seek the immediate suspension of any similar replacement sites it identified.

The company maintains that it will not pay the ransom. Instead, it has offered a total reward of ¥150 million for information that helps identify the attackers. President Masatoshi Kumagai also warned on social media that people redistributing personal information would face a criminal complaint unless they removed it by a specified deadline.

The report says Tokyo's Metropolitan Police Department is investigating suspected violations of Japan's law against unauthorized computer access and other offenses. Investigators have already spoken to GMO representatives to establish the extent of the damage.

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