[7] On January 4, 1953, Futo Izu, the then president of Kumamoto Nihon Shimbun, proposed the establishment of a radio station, which was unanimously agreed by those present.

[8]: 24–45  By 1955, Radio Kumamoto had successfully repaid all debts since its broadcasting, and achieved a profit of 52 million yen.

[8]: 26  In order to start broadcasting on TV, Radio Kumamoto also increased its capital to 150 million yen in 1958.

[8]: 35 In 1961, in order to reflect the reality that television business gradually surpassed broadcasting and became the company's main business, Radio Kumamoto changed the company name to the current Kumamoto Broadcasting, but the initials remained unchanged.

[8]: 33  In 1973, Kumamoto Broadcasting's report on the Taiyo Department Store fire won the JNN Award.

[8]: 34  In the mid-1970s, Kumamoto Broadcasting promoted business diversification, established subsidiaries such as RKK Development, and entered various industries such as real estate and travel.

[8]: 34  At the same time, Kumamoto Broadcasting introduced a complete two-day weekend system in 1975, making it the fifth private radio and television station in Kyushu to achieve it.

[8]: 35 In 1984, Kumamoto Broadcasting introduced a new logo, using green and red as the main colors.

[8]: 38  In 1992, Kumamoto Broadcasting and Kumamoto Kenmin Televisions (KKT) co-produced the program "Here is RKKT" (こちらRKKT, the name being a combination of both RKK and KKT), creating an innovative case of mutual cooperation between local private TV stations.

In 2023, the 70th anniversary of its founding, Kumamoto Broadcasting launched a new logo, using blueish-green as its primary color.