Japan Radio Network

Japan Radio Network (JRN; Japanese: ジャパン・ラジオ・ネットワーク) is a Japanese commercial radio network run by TBS Radio in Tokyo, owned by TBS Holdings (which is a part of the major conglomerate Mitsui Group). Established on 2 May 1965, JRN is made up of 34 regional affiliates, including four full-time affiliates and 31 stations that are dual-affiliated with the rival National Radio Network (NRN) as a part of "cross-network" practice in Japan. While the Japan News Network, the television arm of TBS, has an agreement that forbids its affiliates (examples are RKK & MBS) to do news sharing with other stations affiliated with other networks, JRN allows its radio stations to do cross-network programming, mainly, with NRN programs, and other production companies (Including Tuesday Club programs.). Currently, JRN has 4 stations that are only affiliated with the network, which consists of key stations TBS Radio, CBC Radio, RKB Radio, and JRN-only affiliate RBC iRadio.

Out of the 34 regional affiliates, 21 JRN stations are connected with a JNN station (ex. RCC Radio & RCC Television), with some operating the affiliate as a separate radio subsidiary (ex. MBS Radio and CBC Radio), 10 are connected with a Nippon TV (NNN/NNNS) affiliate (ex. KRY Radio & KRY Television), 1 as a radio subsidiary of Asahi Broadcasting Corporation (whose TV subsidiary is under ANN, and is a former JNN affiliate), one connected to a dual NNN/NNS & ANN affiliate (Fukui Broadcasting), and two that are operating as a radio-only station (RFC and WBS). RSK Sanyo Broadcasting, whose radio is JRN-only before, joined NRN on October 1997, with then NRN-only RNC joining JRN at the same time. Both stations were the last to join the said networks, making RSK Radio & RNC Radio the default JRN/NRN affiliates serving Okayama and Takamatsu respectively. 3 JRN-affiliated stations, whose television stations are tied to JNN, are NRN-core stations, with dedicated lines for NRN programs, mostly from Nippon Broadcasting/JOLF. These stations are: RCC in Hiroshima, TBC in Sendai, and SBS in Shizuoka.

Key stations CBC Radio and RKB Radio airs some programming from rival NRN that are not aired by their affiliates, including the late-night All-Night Nippon family of programs, while HBC Radio (Hokkaido Broadcasting), despite being a dual JRN/NRN affiliate, carries more JRN programming than any other affiliate, only airing NRN programs that NRN core station STVradio will not air. Despite not being a member of the network, independent station and former NRN affiliate in Kobe, Radio Kansai, airs some JRN programming, including the late night JUNK comedy line up. Also, NRN-only core station OBC Radio Osaka also airs some JRN programming, including the BRAND NEW MORNING radio program.

In addition, all JRN affiliates, excluding Hokkaido (HBC) and Akita (ABS), are in the process of transitioning from AM radio to Wide FM since 2024, with some stations, like KRY in Yamaguchi, are suspending almost all of their AM relays, including their main AM hub, in order to facilitate FM broadcasting during the experimental stage. The transition will last up until 2028.

List of affiliates

Stations are listed mostly in Japanese order of prefectures which is mirrored in ISO 3166-2:JP.

Broadcasting area(s) Station Frequency Start date of
broadcast 		Date of
affiliation 		Dual
affiliation
with NRN 		Note(s)
Prefecture Region On air branding Abbr. Call sign AM FM
Hokkaidō HBC Radio HBC JOHR 1287 kHz 91.5 MHz 10 March 1952 2 May 1965 Yes Core station
Aomori Tōhoku Aomori Hōsō RAB JOGR 1233 kHz 91.7 MHz 12 October 1953 2 May 1965 Yes
Iwate Tōhoku Iwate Hōsō IBC JODF 684 kHz 90.6 MHz 25 December 1953 2 May 1965 Yes
Miyagi Tōhoku Tohoku Hōsō TBC JOIR 1260 kHz 93.5 MHz 1 May 1952 2 May 1965 Yes
Akita Tōhoku Akita Hōsō ABS JOTR 936 kHz 90.1 MHz 1 November 1953 2 May 1965 Yes
Yamagata Tōhoku Yamagata Hōsō YBC JOEF 918 kHz 92.4 MHz 15 October 1953 2 May 1965 Yes
Fukushima Tōhoku Radio Fukushima RFC JOWR 1458 kHz 90.8 MHz 1 December 1953 2 May 1965 Yes
Kantō region TBS Radio TBS JOKR 954 kHz 90.5 MHz 25 December 1951 2 May 1965 No Flagship station
Niigata Chūbu Niigata Hōsō BSN JODR 1116 kHz 92.7 MHz 24 December 1952 2 May 1965 Yes
Toyama Chūbu Kitanihon Hōsō KNB JOLR 738 kHz 90.2 MHz 1 July 1952 1 December 1980 Yes
Ishikawa Chūbu Hokuriku Hōsō MRO JOMR 1107 kHz 94.0 MHz 10 May 1952 2 May 1965 Yes
Fukui Chūbu Fukui Hōsō FBC JOPR 864 kHz 94.6 MHz 20 July 1952 2 May 1965 Yes
Yamanashi Chūbu Yamanashi Hōsō YBS JOJF 765 kHz 90.9 MHz 1 July 1954 2 May 1965 Yes
Nagano Chūbu Shin-etsu Hōsō SBC JOSR 1098 kHz 92.2 MHz 25 March 1952 2 May 1965 Yes
Shizuoka Chūbu Shizuoka Hōsō SBS JOVR 1404 kHz 93.9 MHz 1 November 1952 2 May 1965 Yes
Aichi and Gifu Chūbu CBC Radio CBC JOAR 1053 kHz 93.7 MHz 1 September 1951 2 May 1965 No Core station
Mie Kansai
Kansai region (except Mie) MBS Radio MBS JOOR 1179 kHz 90.6 MHz 1 September 1951 2 May 1965 Yes Core station
Kansai region (except Mie) ABC Radio ABC JONR 1008 kHz 93.3 MHz 11 November 1951 2 May 1965 Yes Core station
Wakayama Kansai Wakayama Hōsō WBS JOVF 1431 kHz 94.2 MHz 1 April 1959 2 February 1979 Yes
Tottori and Shimane Chūgoku San-in Hōsō BSS JOHF 900 kHz 92.2 MHz 1 March 1954 2 May 1965 Yes
Okayama Chūgoku Sanyo Hōsō RSK JOYR 1494 kHz 91.4 MHz 1 October 1953 2 May 1965 Yes
Hiroshima Chūgoku RCC Broadcasting RCC JOER 1350 kHz 94.6 MHz 1 October 1952 2 May 1965 Yes
Yamaguchi Chūgoku Yamaguchi Hōsō KRY JOPF 765 kHz 92.3 MHz 1 April 1956 26 October 1982 Yes
Tokushima Shikoku Shikoku Hōsō JRT JOJR 1269 kHz 93.0 MHz 1 July 1952 2 May 1965 Yes
Kagawa Shikoku Nishinippon Hōsō RNC JOKF 1449 kHz 90.3 MHz 1 October 1953 5 September 1997 Yes
Ehime Shikoku Nankai Hōsō RNB JOAF 1116 kHz 91.7 MHz 1 October 1953 2 May 1965 Yes
Kōchi Shikoku Kochi Hōsō RKC JOZR 900 kHz 90.8 MHz 1 September 1953 2 May 1965 Yes
Fukuoka Kyūshū RKB Radio RKB JOFR 1278 kHz 91.0 MHz 1 December 1951 2 May 1965 No Core station
Saga Kyūshū NBC Radio Saga NBC JOUO 1458 kHz 93.5 MHz 1 August 1958 2 May 1965 Yes
Nagasaki Kyūshū Nagasaki Hōsō NBC JOUR 1233 kHz 92.6 MHz 1 March 1953 2 May 1965 Yes
Kumamoto Kyūshū Kumamoto Hōsō RKK JOBF 1197 kHz 91.4 MHz 1 October 1953 2 May 1965 Yes
Ōita Kyūshū Oita Hōsō OBS JOGF 1098 kHz 93.3 MHz 1 October 1953 2 May 1965 Yes
Miyazaki Kyūshū Miyazaki Hōsō MRT JONF 936 kHz 90.4 MHz 1 July 1954 2 May 1965 Yes
Kagoshima Kyūshū Minaminihon Hōsō MBC JOCF 1107 kHz 92.8 MHz 10 October 1953 2 May 1965 Yes
Okinawa Kyūshū RBC-i Radio RBC JORR 738 kHz 92.1 MHz 1 October 1954 15 May 1972 No


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