J:COM

JCOM Co., Ltd.
Native name	JCOM株式会社
Romanized name	Jeikomu kabushiki-gaisha
Formerly	Jupiter Telecommunications Co., Ltd. (1995-2021)
Company type	Private
Traded as	TYO: 4817
Industry	Telecommunications; Mass media;
Headquarters	Marunouchi, Chiyoda, Tokyo, Japan
Owner	KDDI (50%); Sumitomo Corporation (50%);
Subsidiaries	Asmik Ace; J:COM BS; J Sports; Jupiter Golf Network; Warner Bros. Discovery Japan (minority stake);
Website	jcom.co.jp; jcom.co.jp/corporate;

JCOM Co., Ltd. is a Japanese company headquartered in Chiyoda, Tokyo, whose main operation is an MSO (multiple-system) cable operator in Sapporo, Sendai, Tokyo, Osaka and Fukuoka. It is a consolidated subsidiary of KDDI, and is a 50/50 joint venture with Sumitomo Corporation.

Previously known as Jupiter Communications, the company uses the brand name J:COM, and many of its subsidiaries have the J:COM name.