Japan’s NTT Docomo Knocked Offline: DDoS Attack Disrupts Services for 12 Hours
Japan’s largest mobile operator, NTT Docomo, faced a DDoS attack that left its services in a digital traffic jam for nearly 12 hours. Despite 90 million subscribers enjoying speedy downloads, key services like “goo” and Lemino were hit with network congestion. Who knew cyber villains had such poor phone etiquette?

Hot Take:
Who knew that a DDoS attack could bring Japan’s largest mobile operator, NTT Docomo, to its knees for nearly 12 hours? Seems like the threat actors were playing a game of ‘Let’s see how many services we can disrupt before lunch’—and they won! Maybe next time, Docomo will learn to dodge the digital dodgeball.
Key Points:
- NTT Docomo experienced a 12-hour DDoS attack disrupting multiple services.
- Services affected included “goo” web portal, Lemino streaming, dpay billing, and “Golf me” service.
- Mobile phone services remained unaffected by the cyber assault.
- A spike in global DDoS attacks noted, with a 102% increase reported in 2024.
- Past incidents include a ransom demand from Ransomed.vc group in September 2023.
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