RSK Sanyo Broadcasting

RSK Sanyo Broadcasting is a Japanese commercial broadcasting company based in Okayama and serving audiences in Okayama and Kagawa prefectures. Its operations comprise terrestrial television and radio broadcasting, regional news, information programming, sports coverage, entertainment, and related media activities. The company’s name and identity derive from Radio Sanyo, the organization established in the early postwar expansion of private broadcasting in Japan. The abbreviation RSK is retained from that historical name. The broadcaster began radio transmission on October 1, 1953, becoming one of Japan’s early privately operated radio stations. Its launch followed preparations by local political, administrative, and business interests, including Sanyo Shimbun, the Okayama prefectural and Okayama city governments, and the Tenmaya department-store group. Although the station initially recorded a loss, it became profitable during its first full year of operation and subsequently expanded its coverage through relay facilities, including a station in Tsuyama. Television became the company’s principal growth area. After applying for a television license soon after the radio launch, Radio Sanyo began television broadcasting on June 1, 1958. Its initial schedule combined programming supplied by network partners with locally produced material. The television service joined the Japan News Network in 1959, strengthening its relationship with TBS and positioning RSK as the JNN television station for the Okayama–Kagawa market. The company changed its name to Sanyo Broadcasting in 1961 to reflect television’s increasing importance. RSK developed a reputation for regional reporting and technical experimentation. It introduced color television in the 1960s, began producing local news in color, launched an early local evening news format in 1971, and became the first broadcaster in the Okayama–Kagawa area to transmit stereo television programming in 1980. It also pursued innovations in radio transmission, including an early attempt to obtain a commercial FM license and the use of a unified medium-wave frequency across its regional service area. RSK’s local journalism has covered public-interest subjects beyond the immediate prefectural market, including industrial-waste reporting in Kagawa that received national recognition in 1999. The company has also contributed to network and international coverage. It joined the Japan Radio Network in 1965 as one of the network’s early members and added affiliation with the National Radio Network in 1997. The latter change expanded its radio schedule to include nationally distributed programs such as All Night Nippon and professional baseball coverage. RSK maintained an overseas news presence through a Beirut bureau, later relocated to Cairo, and participated in JNN reporting during the 1991 Persian Gulf War. The Cairo bureau was closed in 2012. RSK entered the digital television era on December 1, 2006, and ended analog television transmission on July 24, 2011. In 2019, the former Sanyo Broadcasting organization was reorganized into a broadcasting holding-company structure. RSK Holdings became the holding company, while the newly established RSK Sanyo Broadcasting inherited the radio and television businesses. This made the organization one of Japan’s early regional broadcasting holding-company structures and the first such example outside the country’s largest established broadcasting centers, according to the company’s historical account. The broadcaster subsequently consolidated its operations at a new headquarters in Okayama. The building was completed on July 22, 2020, with offices, production facilities, and a concert hall. The site also incorporated the relocation of Taro Okamoto’s relief sculpture “Leap Forward.” Today, RSK Sanyo Broadcasting remains a regional television and radio operator whose competitive role combines network programming with locally produced news, information, cultura…

The origins of RSK Sanyo Broadcasting lie in the expansion of private broadcasting in Japan during the early 1950s. In Okayama, Sanyo Shimbun, local government bodies, and regional business interests organized the first founders’ meeting for Radio Sanyo on November 1, 1952. An application for a private broadcasting license followed later that month. The company held its founding general meeting on April 1, 1953, and prepared facilities in the annex of the Tenmaya department store before beginning radio transmissions at 10 a.m. on October 1, 1953. It became the twenty-first private radio station in Japan. The new station suffered an initial operating loss, but its financial position improved rapidly. It reported a profit in 1954, established a relay station in Tsuyama in 1956, and expanded its regional reach. The company had already applied for a television license in October 1953, shortly after radio broadcasting began. To serve the wider Okayama–Kagawa area, it planned its principal television transmitting facility around Mount Kinka. Television broadcasting began on June 1, 1958. Early schedules contained programming from Radio Tokyo, Nippon Television, Osaka Television, and the company’s own production department. After the television service of Nishinippon Broadcasting began, RSK reduced its carriage of Nippon Television programming. In 1959, its television operation joined the Japan News Network, establishing a durable relationship with TBS and the wider JNN system. As the organization grew, it developed a purpose-built broadcasting hall and headquarters. Construction began in 1961, and departments moved into the facility during 1962. The company changed its name from Radio Sanyo to Sanyo Broadcasting on September 1, 1961, reflecting the increasing centrality of television. A Takamatsu branch opened in 1964 to strengthen activity in Kagawa and was later renamed the Shikoku Branch in 1981. RSK introduced color television in 1966 and color local-news production two years later. In 1971 it launched a local evening news program, an early example of a commercial broadcaster building a regular regional news format in the evening. The company introduced a corporate identity system and its second-generation trademark in 1973, expanded its headquarters in 1979, and began stereo television transmission in 1980. The stereo service was the first of its kind in the Okayama–Kagawa area. The broadcaster pursued technical and editorial initiatives beyond routine network operations. It had applied for an early commercial FM license in the late 1950s, although that license was later withdrawn. In 1980, it unified the frequency used by its radio service within the area, creating a same-frequency regional service. In October 1992, selected relay stations began stereo radio transmission. RSK also opened an overseas bureau in Beirut in 1973; worsening conditions led to its relocation to Cairo in 1976. During the 1991 Persian Gulf War, the Cairo bureau contributed to JNN’s Middle East coverage. The bureau closed in 2012. The opening of the Seto Ohashi Bridge in 1988 prompted RSK to help produce joint JNN news specials and operate a satellite studio at the Seto Ohashi Expo. In 1989, the company opened a new news studio and introduced a satellite news-gathering system. Its reporting on industrial waste in Toshima, Kagawa, was recognized with a major award from China’s National Liberation Federation in 1999. RSK produced its first high-definition television program in 2001. On the radio side, RSK joined the Japan Radio Network on May 2, 1965, becoming one of that network’s early members. It remained a JRN-only station for many years. In October 1997 it also joined the National Radio Network, making it possible to carry programs including All Night Nippon and professional baseball broadcasts. This change expanded the range of national programming available through RSK Radio and complemented the network arrangements of neighboring stations in Kagawa. RSK began digital television broadcasting on December 1, 2006, and terminated analog transmission on July 24, 2011. The company closed its Cairo bureau in 2012. In May 2018, Sanyo Broadcasting announced plans for a broadcasting holding-company structure. Following regulatory approval and completion of the required legal procedures, the reorganization took effect on April 1, 2019. Sanyo Broadcasting became RSK Holdings, while the newly formed RSK Sanyo Broadcasting took over the radio and television businesses. The reorganized broadcaster acquired land formerly occupied by Korakukan Middle School from Okayama City for a new headquarters. The new facility was completed on July 22, 2020, with five floors above ground, one basement level, approximately 11,421 square meters of total floor area, and a concert hall. Taro Okamoto’s relief sculpture “Leap Forward” was also moved to the site. RSK Sanyo Broadcasting continues to operate as the group’s regional broadcasting company, combining television and radio network affiliation with local reporting and programming for Okayama and Kagawa.

1. 2020New headquarters completed

   The company completed its new Okayama headquarters, including broadcast facilities and a concert hall.

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2. 2019Broadcasting holding-company structure established

   RSK Holdings became the holding company and RSK Sanyo Broadcasting assumed the radio and television businesses.

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3. 2011Analog television ends

   Analog television transmission ended on July 24 as part of Japan’s digital switchover.

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4. 2006Digital television begins

   RSK started digital television transmission on December 1.

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5. 1997Radio joins the National Radio Network

   RSK Radio joined NRN in October, expanding its national radio programming options.

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6. 1991Cairo bureau contributes to Gulf War coverage

   RSK’s Cairo bureau supported JNN’s reporting from the Middle East during the Persian Gulf War.

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7. 1980Stereo television and unified radio frequency introduced

   RSK began stereo television transmission and unified its regional radio frequency at 1494 kHz.

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8. 1971Local evening news launched

   The company introduced a regular local evening television news program.

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9. 1966Color television introduced

   Sanyo Broadcasting began airing color television programs.

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10. 1965Radio joins the Japan Radio Network

    RSK joined JRN on May 2 as one of the network’s first members.

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11. 1961Name changed to Sanyo Broadcasting

    The company adopted the Sanyo Broadcasting name as television became its principal business.

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12. 1959Television joins the Japan News Network

    The television department joined JNN, creating the company’s long-term network relationship with TBS and affiliated stations.

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13. 1958Television service launched

    Radio Sanyo began television broadcasting on June 1, extending the company from radio into regional commercial television.

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14. 1953Radio Sanyo begins broadcasting

    Radio Sanyo began radio transmission on October 1, becoming Japan’s twenty-first private radio station.

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15. 1952Founders organize Radio Sanyo

    Local newspaper, government, and business interests held a founders’ meeting in Okayama and submitted an application for a private radio license.

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A regional Japanese broadcaster focused on locally relevant television, radio, journalism, and community information for the Okayama–Kagawa market, while distributing national programming through its JNN, JRN, and NRN affiliations.

• RSK TelevisionTerrestrial television1958

  RSK’s commercial television service for the Okayama–Kagawa region. It combines JNN network programming with locally produced news, information, cultural, entertainment, and sports content. The service began in 1958, joined JNN in 1959, introduced color programming in the 1960s, adopted stereo transmission in 1980, and moved from analog to digital terrestrial broadcasting between 2006 and 2011.

• RSK RadioAM radio1953

  RSK’s regional radio operation, originating with Radio Sanyo’s first transmission in 1953. The service distributes locally produced programs and news alongside national programming. It joined JRN in 1965 and NRN in 1997, enabling a broader schedule that included programs such as All Night Nippon and professional baseball broadcasts.

• Regional news and information programmingBroadcast content1971

  RSK produces television and radio journalism focused on Okayama, Kagawa, and the wider Seto Inland Sea region. Its history includes an early local evening television news format, specialized reporting on regional environmental and industrial issues, and contributions to JNN network coverage of major domestic and international events.

• 2019Separate broadcasting operations from the holding companyStrategy

  Sanyo Broadcasting announced a plan in 2018 to establish a broadcasting holding-company structure and completed the required legal and regulatory procedures.

  What changed. On April 1, 2019, Sanyo Broadcasting became RSK Holdings, while the newly formed RSK Sanyo Broadcasting inherited the television and radio operations.

  Aftermath. RSK Sanyo Broadcasting became the operating broadcaster within the new group structure, while RSK Holdings served as the parent holding company.

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• 1997Add National Radio Network affiliationStrategy

  RSK Radio had previously operated as a Japan Radio Network-only affiliate, limiting the range of national radio programming it could carry.

  What changed. RSK joined the National Radio Network in October 1997 and adjusted its schedule to accommodate NRN programming alongside its existing regional and JRN output.

  Aftermath. The change expanded RSK Radio’s access to national entertainment and sports programming, including All Night Nippon and professional baseball coverage.

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• 2020New RSK headquarters completed in Okayama

  RSK completed a new headquarters in Okayama on July 22, 2020. The five-story building includes broadcast facilities and a concert hall, and also became the new location for Taro Okamoto’s relief sculpture “Leap Forward.”

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• 2019RSK Sanyo Broadcasting created through broadcasting reorganization

  The former Sanyo Broadcasting organization was reorganized on April 1, 2019. RSK Holdings became the holding company and RSK Sanyo Broadcasting inherited the television and radio businesses.

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• 2006RSK begins digital television transmission

  RSK began broadcasting digital television signals on December 1, 2006, marking its transition from analog terrestrial television.

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• 1997RSK radio joins the National Radio Network

  After operating for many years as a Japan Radio Network-only affiliate, RSK Radio joined the National Radio Network in October 1997, adding nationally distributed programming and sports content.

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1. RSK Sanyo Broadcasting
2. RSK Sanyo Broadcasting official website