Miyazaki Broadcasting
A Japanese commercial broadcaster serving Miyazaki Prefecture through radio and television under the MRT brand.
Last updated August 31, 2026
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Overview
Miyazaki Broadcasting Co., Ltd. is a commercial radio and television broadcaster based in Miyazaki, Japan. Its service area is Miyazaki Prefecture, where it operates radio programming affiliated with the Japan Radio Network (JRN) and the National Radio Network (NRN), together with television programming affiliated with the Japan News Network (JNN). The company uses the abbreviation MRT, derived from “Miyazaki Radio and Television,” and is the principal local broadcaster represented by that identity. The company emerged from an effort to establish a locally based private radio station after the Japanese government announced a frequency allocation for Miyazaki Prefecture in May 1953. Local newspaper, political, and business figures supported the creation of a Miyazaki-based operator rather than allowing an outside broadcaster from neighboring Kagoshima Prefecture to serve the area primarily through a relay facility. Radio Miyazaki applied for a broadcasting license in December 1953, held its founding meeting in March 1954, and began radio broadcasting at 5:20 a.m. on July 1, 1954. Its initial radio operation encountered interference from other stations using the same frequency. The service moved from 1490 kilocycles to 1480 kilocycles in October 1956, and relay stations were subsequently opened in Nobeoka and Miyakonojo. These technical changes expanded effective coverage across the prefecture. The broadcaster then pursued television, applying for a television license in 1956 and developing transmission infrastructure that included a signal station on Mount Kurozuka. Television broadcasting began on October 1, 1960, with the station joining JNN. In 1961, the company changed its name from Radio Miyazaki to Miyazaki Broadcasting to reflect its combined radio and television role. At the same time, its former RMK abbreviation was replaced by MRT. The broadcaster continued to upgrade its production and transmission capabilities, introducing color television in 1966 and electronic news gathering equipment in 1977. During the early 1980s it built a new central Miyazaki facility. Completed in 1984, the Miyazaki Broadcasting Center combined newsroom, studio, office, and commercial-cultural functions; its lower floors housed MRT micc, while the upper floors contained the broadcaster’s operating facilities. Miyazaki Broadcasting entered the digital television era in December 2006 and ended analog television transmission in July 2011, in line with Japan’s nationwide digital switchover. A revised corporate logo was introduced in 2014 for the company’s sixtieth anniversary. The MRT brand today covers local news, information, entertainment, sports, cultural programming, advertising, and radio and television distribution for audiences in Miyazaki Prefecture. The available reference material does not establish a separate national expansion strategy, a parent corporation, current executives, or a publicly traded ticker.
History
The origins of Miyazaki Broadcasting lie in Japan’s postwar expansion of private broadcasting. On May 30, 1953, the Ministry of Posts and Telecommunications announced a frequency allocation plan for Miyazaki Prefecture. Local commercial interests initially showed limited willingness to establish a station, while Minaminihon Broadcasting in neighboring Kagoshima considered serving Miyazaki through a relay facility. Local figures, including Yamaguchi Toma of the regional newspaper Hyuga Nichi Shimbun, helped organize support for an independent Miyazaki operator. Radio Miyazaki submitted a broadcasting-license application on December 17, 1953. Its founding meeting took place on March 17, 1954, and the company was registered on March 24. Regular radio transmission began at 5:20 a.m. on July 1, 1954. The original service used 1490 kilocycles, but co-channel interference from Radio Yamanashi and the American Forces radio service in the Far East led to a move to 1480 kilocycles on October 1, 1956. Relay facilities were added in Nobeoka in November 1956 and Miyakonojo in May 1958, improving coverage beyond the prefectural capital. The company applied for a television license on June 25, 1956. To support broad television coverage in mountainous terrain, it selected Mount Kurozuka as the location for a major transmitting facility. At the time, constructing such a station at the summit of a high mountain was an unusual undertaking in Japan. The company also expanded its workforce and built television production facilities. Television service began on October 1, 1960, and the station joined the Japan News Network. Because its business now included both radio and television, the company changed its corporate name in 1961 from Radio Miyazaki to Miyazaki Broadcasting. The abbreviation changed from RMK to MRT, reflecting the English-derived concept of Miyazaki Radio and Television. The broadcaster continued technical and organizational development during the following decades. It recorded a 10 percent stock dividend in 1962, marked its tenth anniversary in 1964 with renovations and special programming, and introduced color television transmission on December 10, 1966. Electronic news gathering equipment was introduced in 1977. That year the company also decided to construct a new headquarters in central Miyazaki. Building work began in 1982, and the Miyazaki Broadcasting Center was completed in late August 1984. The facility contained one basement level and seven above-ground floors, with a reported total floor area of approximately 12,700 square meters. The first through third floors were used by MRT micc, a commercial and cultural complex, while the fourth through seventh floors housed Miyazaki Broadcasting operations, including radio recording and television studio facilities. Programs began originating from the new headquarters on September 1, 1984. A new logo was introduced in 1984 as part of the thirtieth-anniversary identity program. Miyazaki Broadcasting began digital terrestrial television transmission on December 1, 2006. Analog television transmission ended on July 24, 2011, completing the station’s transition to digital television. In 2014, the company introduced another logo on the occasion of its sixtieth anniversary. Its continuing role is that of a regional Japanese broadcaster serving Miyazaki Prefecture through radio and JNN-affiliated television, with local programming and community-oriented commercial media services under the MRT name.
- 2014
Sixtieth-anniversary logo introduced
[1]Miyazaki Broadcasting launched a new logo to mark its sixtieth anniversary.
- 2011
Analog television ends
[1]Analog television transmission ended on July 24 as part of Japan’s digital television transition.
- 2006
Digital terrestrial television begins
[1]Digital television transmission began on December 1.
- 1984
New Miyazaki Broadcasting Center opens
[1]The new central facility was completed and programming moved there in September. The company also introduced a new corporate logo.
- 1977
Electronic news gathering introduced
[1]The broadcaster began adopting electronic news gathering equipment and decided to build a new central headquarters.
- 1966
Color television introduced
[1]Miyazaki Broadcasting began color television transmission in December.
- 1961
Company adopts the Miyazaki Broadcasting name
[1]The company changed its name from Radio Miyazaki to Miyazaki Broadcasting and replaced RMK with MRT.
- 1960
Television broadcasting begins
[1]The company launched television service on October 1 and joined JNN.
- 1958
Miyakonojo relay station opens
[1]A second relay facility began operation in Miyakonojo, extending the radio service area.
- 1956
Frequency change and first relay station
[1]The station moved to 1480 kilocycles to reduce interference and opened a relay station in Nobeoka.
Products and positioning
A prefecture-focused integrated broadcaster combining local radio and television services with regional news, information, entertainment, sports, and community-oriented programming.
Radio broadcasting · 1954
MRT Radio
Miyazaki Broadcasting’s radio service began in 1954 and operates within the JRN and NRN affiliation systems. Its regional service includes local information, news, entertainment, culture, sports, and commercial programming for listeners across Miyazaki Prefecture. Relay facilities in Nobeoka and Miyakonojo helped expand the effective coverage of the original service.
Television broadcasting · 1960
MRT Television
The television service launched in 1960 and joined the Japan News Network. It provides a prefecture-focused mix of local news, information, entertainment, cultural, sports, and commercial programming. The service moved from analog to digital terrestrial transmission between its digital launch in 2006 and the analog shutdown in 2011.
Commercial and cultural facility · 1984
MRT micc
MRT micc occupies the lower floors of the Miyazaki Broadcasting Center. It forms part of the company’s broader commercial and cultural presence in central Miyazaki, alongside the broadcaster’s radio, television, studio, and office operations in the upper floors of the building.
Brand decisions
2006
Transition to digital terrestrial televisionGeneration changeBackground
Japan’s television industry was moving from analog transmission to digital terrestrial broadcasting.
Action taken
Miyazaki Broadcasting began transmitting digital terrestrial television signals in December.
Aftermath
Analog television transmission was later discontinued in July 2011.
1961
Rebrand from Radio Miyazaki to Miyazaki BroadcastingStrategyBackground
After launching television, the company’s original radio-only name no longer described its full operating scope.
Action taken
The company adopted the Miyazaki Broadcasting name and changed its abbreviation from RMK to MRT.
Aftermath
MRT became the identity for the company’s combined radio and television operations.
1956
Change radio frequency and expand relay coverageStrategyBackground
The original 1490-kilocycle assignment produced interference with other services using the same frequency.
Action taken
The station moved to 1480 kilocycles and opened relay stations in Nobeoka and later Miyakonojo.
Aftermath
The frequency change and additional relay facilities improved the broadcaster’s ability to serve Miyazaki Prefecture.
Sources2 sources
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