J:COM Cable

https://www.jcom.co.jp
https://www.linkedin.com/company/jupiter-telecommunications-co.-ltd.

J:COM Cable, also known as JCOM, J:Com, or Jupiter Telecommunications, is a privately owned company headquartered in Japan. Operating as a subsidiary of J:COM Corporation, and also noted as a subsidiary of KDDI, the company was founded in 1995 and employs approximately 15,680 individuals. It reported $2.4 billion in revenue as of 2024, functioning as a tier 1 media tech buyer. The company operates as Japan's largest multiple-system operator (MSO) in the cable television industry, with its primary business focusing on providing bundled services to residential customers. These services include multi-channel cable television ("J:COM TV"), high-speed internet ("J:COM NET"), fixed-line and mobile telephony ("J:COM PHONE" and "J:COM MOBILE"), and utility services such as electricity and gas. Furthermore, J:COM operates a media and entertainment division that invests in and manages 17 channels, including J SPORTS, and produces original content like films and animation through its subsidiaries.

2024 Revenue

Founded

1995

Headcount

15,672

Headquarters

Japan

Primary Segment

Telecoms

Ownership

Privately Owned

Deployments

News Summary:

J:Com confirmed on July 7, 2026, that a cyber attack on the KDDI-developed email platform it utilizes compromised email addresses of over 2.59 million customers. The operator linked this unauthorized access to an incident KDDI disclosed on June 23, stemming from a vulnerability exploited in third-party software within KDDI's ISP email platform. This follows KDDI Corporation's detection on June 17, 2026, of unauthorized access to its shared email system, which potentially exposed up to 14.2 million credentials across six Japanese internet service providers due to an exploited vulnerability in third-party software. Earlier on July 7, J:Com established a regional renewable energy procurement model. The model supports its goal of achieving carbon neutrality across operations by the end of the 2030 financial year, dividing electricity demand into three regions and combining diverse procurement methods and regional energy partners to align with its network infrastructure and local electricity needs. Previously, on June 10, J:Com announced plans to broadcast over 300 games from 15 regional qualifying tournaments for Japan's National High School Baseball Championship across its regional J Channel networks, with coverage set to begin on July 4.

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J:COM Cable offers 6 products in the media and telecoms services industry. J:COM Cable's product portfolio comprises of telecoms, consumer electronics and media and TV services.

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J:COM Cable's revenues were over $1B in 2024. Caretta Research has split J:COM Cable's revenue into 6 different product categories, the largest of which is consumer broadband. For full access to J:COM Cable's revenue breakdown subscribe to Caretta Portal.

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