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[SITUATION] · [QUIET] · [TECHNOLOGY]

2 clusters · 6 sources · 21 days · First seen · Last updated

Japanese cable and internet service disruptions

Overview

In early September 2026, Japanese cable providers Joetsu Cable Vision and BTV Co., Ltd. announced scheduled service interruptions for maintenance and infrastructure work. These planned outages affected broadcasting, internet, and telephone services in specific regions of Sanwa Ward and Kagoshima City.

Later in the month, on September 23, a large-scale unplanned disruption occurred affecting J:COM services across various parts of Japan. The outage lasted approximately nine hours, impacting internet connectivity, mobile services, and video streaming. The disruption also hindered customers' ability to reach support centers. The cause of the J:COM failure remained under investigation as of the latest reports.

Entities

BTV Co., Ltd. · J:COM · Joetsu Cable Vision

Timeline

  1. [TECHNOLOGY] 3 sources
    J:COM internet and TV services disrupted across parts of Japan

    J:COM experienced a major service outage in Japan on September 23, 2026, affecting internet, mobile, and TV services for approximately nine hours across parts of the country.

  2. [TECHNOLOGY] 3 sources
    Japanese cable providers announce scheduled service interruptions

    Japanese providers Joetsu Cable Vision and BTV Co., Ltd. have announced scheduled service outages for television, internet, and telephone services due to infrastructure maintenance in September 2026.

Sources

coki.jp · ichi-24.jp · j-cast.com · jcv.co.jp · portal.btvm.ne.jp · ucv.co.jp