MBS is a core station of the
Japan News Network (JNN), with TBS TV serving as its key station. MBS is a member of the "Five Company Federation" (comprising MBS, TBS, HBC, CBC, and RKB) and is a major shareholder of TBS Holdings. It distributes G-Guide EPG data and previously distributed analog G-Guide program data to
Tokushima Prefecture, where
Shikoku Broadcasting, the only commercial TV station there, is affiliated with NNN/NNS. For 16 years and one month, from the start of TV broadcasting until the networking issues were resolved, MBS was a key station of NET (now TV Asahi) and was subsequently affiliated with the
All-Nippon News Network (ANN) upon its launch. During this time, Tokyo Channel 12 (currently
TV Tokyo) was also affiliated with the station. With the complete transition to digital terrestrial broadcasting on July 24, 2011, the listings in newspapers and TV information magazines changed from "Mainichi TV" (or "Mainichi"), which had been used since the start of television broadcasting, to "MBS TV" (or "MBS"). In the terrestrial digital TV G-Guide, it is listed as "MBS Mainichi Broadcasting". Until July 23, 2011, the general name was
Mainichi Broadcasting Television, and when it was simply referred to as MBS during the analog era, it was listed as
Mainichi TV in the radio and television columns of newspapers. On April 1, 2017, the trade name was changed to "MBS Media Holdings", and both TV and radio broadcasting businesses were taken over by the "(New) Mainichi Broadcasting". Subsequently, on April 1, 2021, "MBS Radio Co., Ltd.", newly established as a wholly owned subsidiary of MBS Media Holdings, took over the radio broadcasting license and business held by Mainichi Broadcasting, while Mainichi Broadcasting moved exclusively to television (changing callsign JOOR-DTV to JOOY-DTV). Among the broadcasting stations in Osaka, the company, Asahi Broadcasting Television, and Kansai Television are the three companies that opened earlier than their respective key stations in Tokyo (TBS Television, TV Asahi, and Fuji Television). This occurred because these three companies and the three key stations were unaffiliated at the time of their establishment. Despite being the oldest station in Japan to start radio broadcasting, MBS was the fourth station in Osaka to start TV broadcasting. This was roughly the same time as Asahi (Nippon Educational Television (NET TV) at that time), though MBS was one month behind. Conversely, Yomiuri TV and TV Osaka were established with the intention of joining their respective key stations, so they opened later than those key stations. MBS has a strong connection with
RKB Mainichi Broadcasting; the stations have co-produced and co-sold radio programs. On television, even during the pre-1975 era, Kyushu Asahi Broadcasting (KBC) sold in-house programs that were not organized or sponsored networks. They jointly established a health insurance union and present aspects of sister companies. Additionally, the remote control key ID for analog master stations and digital broadcasting is also "4". The station has a close relationship with Mitsubishi UFJ Bank and Resona Bank. MBS was involved in the establishment of FM802 as a major shareholder alongside
Nippon Broadcasting System. At the time of its establishment, it was organized by Nippon Broadcasting System, and the sales manager was seconded from Mainichi Broadcasting System. The stations often co-host events. In July 2019, a disaster information sharing partnership agreement was signed between FM802 and FM COCOLO, which is operated by the company. ==History==