The abbreviation, OHK stands for Okayama Hoso K. K., the corporate name in romaji.

OHK as founded on March 26, 1968, and began broadcasting on April 1, 1969 as a primary FNN and secondary NET/ANN affiliate for the city of Okayama.

KSB also began broadcasting on that same date as a primary NET/ANN affiliate for northern Kagawa Prefecture.

On April 1, 1979, the Okayama and Kagawa television markets were merged with each other; OHK dropped its secondary affiliation with ANN as it was now able to serve both prefectures.

The station began broadcasting in digital on December 1, 2006, and terminated its analog transmissions on July 24, 2011.