Topic

telecom

ThreatsNov 10, 2026

A Fake Base Station in a Car in Ginza: Japan's First Arrest for SMS Blaster Phishing

Tokyo police arrested a man in Ginza for running a fake mobile base station from a car. The device knocked nearby phones off 4G and 5G, pulled them onto a fake 2G signal, and sent Chinese-language SMS asking for card details. Japan has had no 2G network for over a decade; the attack works because phones still support it.

Policy & LawOct 30, 2026

Japan Asks Carriers to Block a Leak Site: Why Site Blocking Is So Rare, and What the GMO Case Changes

Japan's communications ministry asked telecom carriers to block the site where GMO's attackers published customer data. Blocking is rare in Japan because it touches the constitutional secrecy of communications. We explain the precedents, from child abuse images in 2011 to manga piracy in 2018, and what is new this time.

IncidentsSep 25, 2026

J:COM Internet Outage in Japan: DNS Overload Cut Service for Up to 4 Million Households

On September 23, 2026, heavy external traffic overloaded J:COM's DNS servers and cut internet for up to 4.08 million households for nine hours. Was it a DDoS?