# Japan News Network

The Japan News Network (JNN; Japanese: ジャパン・ニュース・ネットワーク, romanized: Japan Nyūsu Nettowāku) is a Japanese commercial television network run by TBS Television, owned by TBS Holdings (which is a part of the major conglomerate Mitsui Group). The network's responsibility includes the syndication of national television news bulletins to its regional affiliates, and news exchange between the stations. Its affiliate stations also broadcast non-news programs originating from TBS Television. Founded on 1 August 1959,$^{:150–151}$ JNN is made up of 28 full-time affiliates.
It also operates the 24-hour satellite and cable news channel TBS News and the FAST Channel TBS NEWS DIG.

## History
### Initial news exchange agreement

In 1956, when there were only four commercial television stations in Japan (Nippon Television, Tokyo Radio and Television (hereinafter referred to as KRT), Osaka Television Broadcasting, and Chubu Nippon Broadcasting), the television network was quite loose. Nippon Television and KRT in Tokyo had to sell their programs to the two commercial stations (Osaka TV Broadcasting and Chubu Nippon Broadcasting) outside of Tokyo as much as possible in order to recoup their production costs and meet the needs of advertisers. This puts the two stations in an advantageous position by allowing them to freely choose the programs they want to syndicate.$^{:100}$$^{:7}$On 15 November 1956, four commercial television stations signed the Memorandum of Understanding on Television Broadcasting Program Exchange among Four Companies, which specifically stipulated matters related to the syndication of programs.$^{:11–12}$Later, Hokkaido Broadcasting and RKB Mainichi Broadcasting joined the agreement, and the four-company agreement was expanded to a six-company agreement. There were no major changes in the contents of the agreement at that time.$^{:12}$
The agreement later expanded into 10 member stations as Sanyo Broadcasting, Nishinippon Broadcasting, Yomiuri TV, and Television Nishinippon joined into the agreement. With that, the contents of the agreement were drastically changed, centering on special contributions.$^{:12–13}$In October 1957, the Ministry of Posts and Telecommunications issued licenses for 34 commercial TV broadcasters as it became the period of rapid expansion of commercial broadcasters in Japan.$^{:18–19}$ The opening of commercial television outside the metropolitan area meant that the importance of interconnection was increasing.$^{:22–23}$During this period, only a limited number of frequencies available were allocated to few broadcasters, resulting in limited affiliation options for the succeeding broadcasters.$^{:23–24}$
In October 1958, Osaka Television Broadcasting, RKB Mainichi Broadcasting, and Sanyo Broadcasting were explicitly part of the same syndication as KRT, while the Nippon Television syndication consisted of Yomiuri TV, Television Nishinippon, and Nishinippon Broadcasting, and the other three were cross-networked with a slight advantage for KRT.$^{:23}$
At that time, Nippon Television, which had its own highlight programs such as baseball broadcasts, was trying to expand its network through the broadcasting rights of sports events.$^{:24}$ In response to the increasing competition with the broadcaster at that time, it then aired drama and news programming.$^{:24}$The lack of nationwide coverage for commercial broadcasting in Japan makes it even more crucial for local operators to work together while gathering news.$^{:24–25}$In June 1958, KRT, Chubu-Nippon Broadcasting System, Osaka Television Broadcasting, RKB Mainichi Broadcasting, and Hokkaido Broadcasting began to exchange news materials through a network agreement.$^{:25}$

### Establishment of Japan News Network

The broadcast of the wedding of Crown Prince Akihito (later the 125th Emperor, now Emperor Emeritus) and Crown Princess Michiko (now Empress Emerita) on 1 April 1959, played an important role in bringing about the final signing of the news agreement.$^{:33–36}$ On 1 August 1959, with the signing of the new news agreement, the first true national commercial TV network in the country - Japan News Network - was formally established.$^{:1}$
The charter members of the network were: KRT (now known as TBS Television), the network flagship station, Hokkaido Broadcasting, Tohoku Broadcasting, Shizuoka Broadcasting, Shin-etsu Broadcasting, Broadcasting System of Niigata, Hokuriku Broadcasting, Chubu-Nippon Broadcasting, Osaka Television Broadcasting (which later merged with Asahi Broadcasting Corporation), Nihonkai Telecasting, Sanyo Broadcasting, RCC Broadcasting, RKB Mainichi Broadcasting, Nagasaki Broadcasting, Kumamoto Broadcasting, and Minaminihon Broadcasting.$^{:1–2}$Upon the establishment, it already had 16 stations or covered about 80% of Japan's population at that time.$^{:1–2}$Prior to its establishment, there were proposed names for the network which includes Sakura News Network and All-Japan News Network (not to be confused with All-Nippon News Network, which was established in 1970), but it then adopted the current name at the end.$^{:2}$ As stipulated in the network agreement:
* TBS and the member affiliates of the JNN network agreed, upon the creation of JNN, to share news information between the networks while providing both national content for JNN programming produced by TBS and regional news items for their respective programs within their broadcast markers
* TBS' non-news programming are to be aired on the JNN network as well
* TBS prohibited the regional members from airing programming, including news, from its competitor stations
In the early days, each station was free to replace the title of the news program, but on 31 March 1975, after the affiliation change in Kansai from Asahi Broadcasting TV to Mainichi Broadcasting, all network member stations' news branding was unified on the JNN system, with TBS-produced newscasts airing on the regional stations while regional broadcasters provided local content and reporters and news crews for the national programs.$^{:149–152}$
Until 1992 (when i-Television in Ehime became the last broadcaster to be affiliated with JNN), multiple broadcasters either dropped their affiliation with JNN (such as Nihonkai Telecasting when Broadcasting System of San-in started broadcasting$^{:38}$) or have joined JNN upon their establishment (such as Iwate Broadcasting Company,$^{:38}$ Ryukyu Broadcasting,$^{:38}$ and Aomori Television$^{:153–156}$). At present, it consists of 28 full-time stations. There are no JNN member stations in Akita, Fukui, Tokushima, and Saga prefectures.

## List of affiliates

Stations are listed mostly in Japanese order of prefectures which is mirrored in ISO 3166-2:JP, with exceptions for the Kantō region, Aichi-Gifu-Mie, Kansai region (except Mie), Tottori-Shimane and Okayama-Kagawa, which form single wide broadcasting markets respectively. Some broadcasters listed here also have radio operations (either under a single company or as a subsidiary of its holding company).
| Broadcasting area(s) | Broadcasting area(s) | Station | Station | Station | LCN | Start date of broadcast | Date of affiliation | Note(s) |
| Prefecture | Region | On air branding | Abbr. | Call sign | LCN | Start date of broadcast | Date of affiliation | Note(s) |
| Hokkaidō | Hokkaidō | Hokkaidō Hōsō | HBC | JOHR-DTV | 1 | 1 April 1957 | 1 August 1959 | Core station |
| Aomori | Tōhoku | Aomori TV | ATV | JOAI-DTV | 6 | 1 December 1969 | 31 March 1975 | |
| Iwate | Tōhoku | Iwate Hōsō | IBC | JODF-DTV | 6 | 1 September 1959 | 1 September 1959 | |
| Miyagi | Tōhoku | Tohoku Hōsō | tbc | JOIR-DTV | 1 | 1 April 1959 | 1 August 1959 | |
| Yamagata | Tōhoku | TV-U Yamagata | TUY | JOWI-DTV | 6 | 1 October 1989 | 1 October 1989 | |
| Fukushima | Tōhoku | TV-U Fukushima | TUF | JOKI-DTV | 6 | 4 December 1983 | 1 October 1983 | |
| Kantō region | Kantō region | TBS TV | TBS | JORX-DTV | 6 | 1 April 1955 | 1 August 1959 | Eastern flagship station; core station |
| Niigata | Chūbu | Niigata Hōsō | BSN | JODR-DTV | 6 | 24 December 1958 | 1 August 1959 | |
| Toyama | Chūbu | Tulip TV | TUT | JOJH-DTV | 6 | 1 October 1990 | 1 October 1990 | |
| Ishikawa | Chūbu | Hokuriku Hōsō | MRO | JOMR-DTV | 6 | 1 December 1958 | 1 August 1959 | |
| Yamanashi | Chūbu | TV Yamanashi | UTY | JOGI-DTV | 6 | 1 April 1970 | 1 April 1970 | |
| Nagano | Chūbu | Shin-etsu Hōsō | SBC | JOSR-DTV | 6 | 25 October 1958 | 1 August 1959 | |
| Shizuoka | Chūbu | Shizuoka Hōsō | SBS | JOVR-DTV | 6 | 1 November 1958 | 1 August 1959 | |
| Aichi and Gifu | Chūbu | CBC TV | CBC | JOGX-DTV | 5 | 1 December 1956 | 1 August 1959 | Core station |
| Mie | Kansai | CBC TV | CBC | JOGX-DTV | 5 | 1 December 1956 | 1 August 1959 | Core station |
| Kansai region (except Mie) | Kansai region (except Mie) | MBS TV | MBS | JOOY-DTV | 4 | 1 March 1959 | 31 March 1975 | Western flagship station; core station |
| Tottori and Shimane | Chūgoku | San-in Hōsō | BSS | JOHF-DTV | 6 | 15 December 1959 | 15 December 1959 | |
| Hiroshima | Chūgoku | RCC Broadcasting | RCC | JOER-DTV | 3 | 1 April 1959 | 1 August 1959 | |
| Yamaguchi | Chūgoku | TV Yamaguchi | tys | JOLI-DTV | 3 | 1 April 1970 | 1 April 1970 | |
| Okayama | Chūgoku | RSK San-yō Hōsō | RSK | JOYR-DTV | 6 | 1 June 1958 | 1 August 1959 | |
| Kagawa | Shikoku | RSK San-yō Hōsō | RSK | JOYR-DTV | 6 | 1 June 1958 | 1 August 1959 | |
| Ehime | Shikoku | i-TV | ITV | JOEH-DTV | 6 | 1 October 1992 | 1 October 1992 | |
| Kōchi | Shikoku | TV Kochi | KUTV | JORI-DTV | 6 | 1 April 1970 | 1 April 1970 | |
| Fukuoka | Kyūshū | RKB Mainichi Hōsō | rkb | JOFR-DTV | 4 | 1 March 1958 | 1 August 1959 | Core station |
| Nagasaki | Kyūshū | Nagasaki Hōsō | NBC | JOUR-DTV | 3 | 1 January 1959 | 1 August 1959 | |
| Kumamoto | Kyūshū | Kumamoto Hōsō | RKK | JOBF-DTV | 3 | 1 April 1959 | 1 August 1959 | |
| Ōita | Kyūshū | Oita Hōsō | OBS | JOGF-DTV | 3 | 1 October 1959 | 1 October 1959 | |
| Miyazaki | Kyūshū | Miyazaki Hōsō | MRT | JONF-DTV | 6 | 1 October 1960 | 1 October 1960 | |
| Kagoshima | Kyūshū | Minaminihon Hōsō | MBC | JOCF-DTV | 1 | 1 April 1959 | 1 August 1959 | |
| Okinawa | Kyūshū | Ryūkyū Hōsō | RBC | JORR-DTV | 3 | 1 June 1960 | 15 May 1972 | |

### Areas without a JNN station

| Prefecture | Region | Station(s) from neighbouring prefecture | News gathering |
| Akita | Tōhoku | IBC (Iwate) | ATV (Ōdate), TUY (from Nikaho to Oga), IBC (rest of Akita) and tbc (certain big events) |
| Fukui | Chūbu | MRO (Ishikawa) and MBS (Kansai region) | MRO (Reihoku region and Tsuruga City; also handled by CBC in certain cases) and MBS (Reinan region except Tsuruga City) |
| Tokushima | Shikoku | MBS (Kansai region) and RSK (Okayama and Kagawa) | MBS Tokushima Bureau |
| Saga | Kyūshū | RKB (Fukuoka) | RKB |

### Former affiliate stations

Single asterisk (*) indicates former primary affiliate
| Broadcasting area(s) | Broadcasting area(s) | Station | Station | Station | Ch. | Years of affiliation | Current affiliation | Current JNN affiliate | Note(s) |
| Prefecture | Region | On air branding | Abbr. | Call sign | Ch. | Years of affiliation | Current affiliation | Current JNN affiliate | Note(s) |
| Fukushima | Tōhoku | Fukushima TV* | FTV | JOPX-TV | 11 | 1971–1983 | FNN/FNS | TUF | |
| Kansai region (except Mie) | Kansai region (except Mie) | Asahi Hōsō* | ABC | JONR-TV | 6 | 1959–1975 | ANN | MBS | |
| Tottori and Shimane | Chūgoku | Nihonkai TV* | NKT | JOJX-TV | 1 | 1959 | NNN/NNS | BSS | |
* ↑ Affiliated with JNN from 1 June 1971 to 31 March 1983. Owing to network decisions, it changed networks to FNN/FNS. JNN programming returned to Fukushima in December of that year when TUF launched.$^{:30}$
* ↑ Affiliated with JNN from 1 August 1959 to 30 March 1975. Swapped networks with MBS, which at the time was with ANN, owing to shareholder issues with the network.$^{:105,125,201–206}$
* ↑ Affiliated with JNN from 1 August 1959 to 14 December 1959. Changed networks to NTV when BSS started broadcasting and took TBS's programming.$^{:30}$

## Affiliates that wanted to join but gave up

| Broadcasting area(s) | Broadcasting area(s) | Station | Station | Station | Ch. | Current affiliation | Current NNN/NNS affiliate | Note(s) |
| Prefecture | Region | On air branding | Abbr. | Call sign | Ch. | Current affiliation | Current NNN/NNS affiliate | Note(s) |
| Aomori | Tōhoku | RAB | RAB | JOGR-TV | 1 | NNN/NNS | ATV | Due to business reasons. |
| Akita | Tōhoku | ABS | ABS | JOTR-TV | 11 | NNN/NNS | N/A | This is attributed to the technical reasons of the microwave circuit. |
| Toyama | Chūbu | Kitanihon Broadcasting | KNB | JOLR-TV | 1 | NNN/NNS | TUT | Initially, it was assumed that KNB would become an affiliate with Radio Tokyo Television (now TBS Television) due to its network agreement with the neighboring JNN stations. However, KNB ultimately decided to prioritize affiliating with Nippon TV, driven by factors such as the station's strong sales performance during broadcasts and its existing contracts to air professional baseball games. |
| Fukui | Chūbu | Fukui Broadcasting Corporation | FBC | JOPR-TV | 11 | NNN/NNS/ANN | N/A | To avoid conflicts with Hokuriku Broadcasting. |
| Ehime | Shikoku | Nankai Broadcasting | RNB | JOAF-TV | 10 | NNN/NNS | ITV | For technical reasons over the microwave circuit and avoiding competition with Chugoku Broadcasting and Oita Broadcasting. |
| Kochi | Shikoku | Kochi Broadcasting | RKC | JOZR-TV | 8 | NNN/NNS | KUTV | Initially, the decision was made to affiliate with Nippon Television due to its higher popularity at the time of the station's opening and technical-related issues. In 1970, after resolving the issues, the second commercial broadcasting station was supposed to be affiliated with Fuji TV (TV Kochi). However, the relationship between the company and Fuji TV deteriorated, prompting consideration of a switch to TBS, which would have involved leaving the NNN network and joining JNN. Fortunately, TV Kochi, the second station, joined JNN just before the new station launched, rendering the affiliation change unnecessary.$^{:256,258-259,279}$ |
| Saga | Kyūshū | Saga Television Station | sts | JOSH-TV | 36 | FNN/FNS | N/A | It started as a Fuji TV affiliated station, but in the early 1970s, an affiliation change to the TBS system was planned with the help of Nagasaki Broadcasting. As a result, it did not materialize, and the Kaneko family, the proponent who is said to have planned the affiliate change, was forced out of business by Fuji Television and TV Nishinippon. |