MBS is also one of the major stockholders of TBS Holdings, BS-TBS, RKB Mainichi Broadcasting, i-Television, TV-U Fukushima, Hiroshima Home Television, WOWOW., and FM802.

The New Japan Broadcasting System, Inc. (新日本放送株式会社, Shin-Nippon Hōsō Kabushiki-gaisha, NJB) was founded on December 27, 1950.

[1]: 14  At the same time, Kansai businessmen Shinyoshi Terada and Aiji Iwasaki are also interested in getting involved in the broadcasting industry.

The two hit it off immediately, and held a symposium on December 11, 1945, and decided to establish the "New Japan Broadcasting" company.

[1]: 14–15  However, at that time, the Commander-in-Chief of the Allied Forces in Japan preferred to continue the Japanese broadcasting industry's monopoly system of the Japan Broadcasting Corporation (NHK) (among the four Allied countries, especially the Soviet Union, NHK preferred to monopolize it), and did not allow private radio stations to be established, so this idea wasn't quickly achieved.

From October 1947, the occupied government gradually began to favor allowing the establishment of private broadcasters.

[1]: 22  At that time, 12 operators in the Kinki area, supported by Mainichi Shimbun, were most likely to obtain a license.

[1]: 23  Since Tokyo had successfully integrated various applicants into one company at that time, the Radio Supervision Committee also intended to replicate this process in Osaka, but it encountered strong opposition from both New Japan Broadcasting and Asahi Broadcasting.

After Tanaka Kakuei took office as the Post Minister in July 1959, he used political skills to move the TV channel plan in the Himeji area to Osaka, so that two new private TV stations could be built in the Osaka area.

NJB founded Osaka Television Co., Ltd. (大阪テレビ放送株式会社, Ōsaka Terebi Hōsō Kabushiki-gaisha, OTV) on December 1, 1956 with Asahi Broadcasting Corporation (ABC).

On March 1, 1959, after selling all stocks of OTV to ABC, MBS started analog terrestrial television broadcasting independently from OTV, and made a network with Nippon Educational Television Co., Ltd. (NET, the predecessor of TV Asahi Corporation).

However, MBS joined the Japan News Network (JNN) on March 31, 1975 due to then-president of the Asahi Shimbun's[who?]

At the same time, Mainichi Broadcasting set up a television studio on the 8th and 9th floors of the south building of the Mainichi Osaka Kaikan under construction, and built a signal transmitting station on the top of Ikoma Mountain.

[1]: 164  In the mid-1960s, Mainichi Broadcasting participated in the establishment of Tokyo Channel 12 by the Japan Science and Technology Foundation.

[1]: 149–152  In 1971, Mainichi Broadcasting Corporation stopped airing NET TV's "23rd Show" on the grounds that the program content was too vulgar, causing a sensation in the Japanese television industry.

It became an associate member of the European Broadcasting Union in 1969 and signed cooperation agreements with foreign television stations such as WGN-TV in the United States, Czechoslovak Television, ZDF in West Germany and TF1 in France.

[1]: 136–137  Mainichi Broadcasting attaches great importance to international cultural cooperation and hosted the Kansai Performance of the Vienna Boys' Choir in 1964.

[1]: 341–342  In the early 1970s, Japan's four national newspapers conducted an exchange of shares in television stations.

Mainichi Broadcasting ranked first in prime time ratings for 26 consecutive weeks in the first half of 1978.

In 1986, Mainichi Broadcasting regained the top position in advertising revenue among Osaka stations.

[1]: 670–672  In 1993, SVN changed its name to GAORA and became a sports-oriented satellite TV channel.

[1]: 413–416 In 1990, the new headquarters and studios was completed in Chayamachi, Kita Ward, Osaka for the station's 40th anniversary.

[3] The restructuring was completed on April 1st of the following year with the company being rebranded to MBS Media Holdings.