, also known as RNB, is a Japanese broadcast network affiliated with Nippon News Network (NNN). Their headquarters are located in Matsuyama, Ehime Prefecture.

The initials come from the former name, Radio Nankai Broadcasting. The company name Nankai is related to the broadcasting area, and has no relation with the Nankai Electric Railway.

Network 
 TV: Nippon News Network (NNN)
 RADIO: Japan Radio Network (JRN), National Radio Network (NRN)

History 
In February 1953, Kochi Broadcasting planned setting up a relay station in Matsuyama. The Ehime Shimbun, the local newspaper, opposed the decision and began preparations to open the station.
 August 1, 1953: Nankai Broadcasting's radio license is applied.
 September 28, 1953: Nankai Broadcasting is established.
 October 1, 1953: Nankai Broadcasting commences broadcasting.
 October 1, 1956: Two new relay stations open, one in Niihama (JOAL, 800kc) and one in Uwajima (JOAM, 1560kc).
 December 1, 1958: Television broadcasts commence (JOAF-TV, channel 10, output 5KW).
 June 1, 1960: The Niihama TV relay station commences (JOAL-TV, channel 6, video output 250W, audio 63W).
 December 1, 1961: A relay station in Yawatahama opens (channel 4). On the 20th, the Uwajima station opened (channel 10, video 75W, audio 18.8W).
 February 1964: Relocation to the new building. RNB Radio moves on February 26, RNB TV on February 29.
 October 1, 1964: Color broadcasts commence (networked programming). On the same day, a relay station in Ozu opens (channel 11).
 June 1, 1965: RNB opens its first UHF relay station in Kawanoe (channel 61).
 April 1, 1966: Joins the Nippon News Network, consolidating its relations with Nippon Television.
 October 1, 1968: RNB broadcasts its first local color production, a documentary about people from Ehime prefecture living in other parts of Asia.
 November 1, 1968: RNB started regular broadcasting of in-house local programming in color, the videotape facilities were also converted.
 June 30, 1969: RNB TV stops interrupting its schedule from 4:50pm to 5:20pm.
 August 10, 1969: Local news converted to color.
 December 10, 1969: EBC launches as the FNN affiliate. Most of its primary programming was removed in October as part of a reoganization in anticipation for its launch.
 May 12, 1970: Nankai Broadcasting exchanges footage of the Setouchi Sea Jack incident with NNN affiliate Hiroshima Telecasting.
 November 23, 1978: Following the change in the AM frequency plan for stations to broadcast in fractions of 9KHz, the frequencies of the RNB stations were changed thusly: Matsuyama, Imabari and Yawatahama moved to 1116KHz, Niihama to 1557KHz.
 March 15, 1980: AM stereo broadcasts are conducted.
 February 21, 1988: RNB transmits the Ehime Marathon for the first time.
 July 19, 1990: RNB starts dual audio broadcasting for certain shows.
 October 1, 1992: With the start of ITV, the JNN affiliate, 10 TBS programs are moved to the new station.
 April 1995: With the opening of Ehime Asahi Television, 8 TV Asahi programs, excluding those produced by the Private Broadcasting Education Association, will be transferred to the new station.
 April 1, 1996: The Niihama relay moves to 1116KHz. All AM stations now share the same frequency.
 March 2000: Club N, a mobile site, opens.
 June 21, 2006: Digital terrestrial broadcasts commence.
 July 24, 2011: Analog terrestrial broadcasts conclude.
 April 2012: RNB opens their official Facebook page.
 December 1, 2014: An FM relay station, Fnam, launches.
 March 13, 2023: Launch of the SVOD platform Nankai On Demand. The service consists of in-house productions and aims to increase its content to include more original programming, videos and live sports.

Stations

Analog TV
Matsuyama (Main Station) JOAF-TV 10ch 5 kW
Imabari 34ch 100w
Yawatahama 4ch 250w
Niihama JOAL-TV 6ch 250w

Digital TV(ID:4) 
Matsuyama (Main Station) JOAF-DTV 20ch
Niihama 47ch

AM Radio (1116kHz) 
Matsuyama (Main Station) 5 kW JOAF
Niihama 1 kW JOAL
Uwajima 1 kW JOAM
Ōzu 100w JOAN
Misho 100w JOAS
Yawatahama 100w

FM Radio (91.7 MHz FM) 
Matsuyama (Main Station) 1 kW

References

External links
 RNB Official Site

Companies based in Ehime Prefecture
Television stations in Japan
Radio in Japan
Nippon News Network
Radio stations established in 1953
Television channels and stations established in 1958
Mass media in Matsuyama, Ehime
1953 establishments in Japan