Nippon News Network (NNN) is a Japanese commercial television network owned by Nippon Television (NTV), which itself is controlled by The Yomiuri Shimbun Holdings.

Therefore, all commercial broadcasters in the Shikoku Region chose to be part of the Nippon TV network while those in Kyushu Region chose to be part of the Japan News Network.

When NNN was launched, there were no affiliated stations throughout Kyushu, including Fukuoka Prefecture (At the time NNN was launched, Nippon Television set up a Kyushu branch office in Fukuoka).

Also, in the Chukyo area, secondary affiliations continued for a long time (Nagoya TV → Chukyo TV), and it took more time to create a system than JNN and FNN (The first stations in the Sea of Japan area of Tohoku, Toyama, Fukui, Yamanashi, 4 prefectures of Shikoku, Tottori and Yamaguchi are all NNN affiliates).

Kagoshima Yomiuri Television joined in 1994, completing the current system.