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Japan companies compensate users as cyberattacks buffet economy

GMO Internet and Park24 will pay customers after attacks exposed personal data and forced service disruptions, with millions of hacking attempts reported, officials said.

  • Japanese companies are issuing compensation to users following waves of cyberattacks that disrupted internet services, with GMO Internet and Park24 among those responding.
  • Last week, government and company websites went offline after millions of hacking attempts targeted vulnerabilities in the PHP programming language, with TrendAI reporting 723 incidents through October 20, exceeding 2025 and 2024 annual totals.
  • GMO Internet CEO Masatoshi Kumagai announced customers would receive 5,000 yen as "an initial gesture of good faith" and refused ransom demands, offering free alternative services for six months.
  • Shares of GMO slumped 11% in Tokyo trading on Friday, while the company expects to book an extraordinary loss of 5.5 billion yen due to response efforts and compensation payments.
  • Japan announced Friday it will establish a team to simulate cyberattacks using AI to identify technology system weaknesses, with Kumagai stressing that public and private sectors must work together to protect the nation.
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Cyberattacks on Japanese companies are becoming more and more frequent, not only crippling online services but also imposing significant liability for damages. The severity of the situation has forced the Tokyo government to take steps to strengthen its defense systems.

·Budapest, Hungary
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On the Tokyo Stock Exchange on the 26th, shares of GMO Internet Group fell by more than 12% at one point compared to the previous weekend. Selling pressure spread due to concerns about compensation costs for customers and the impact on earnings following an unauthorized access issue involving services provided by its subsidiary companies.

·Japan
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BizToc broke the news on Monday, October 26, 2026.
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