Murakami Advertising Network

Murakami Kōkoku Nettowāku (Japanese: 村上広告ネットワーク, English: Murakami Advertisement Network), commonly known by its acronym MKN, was a Murakamese advertising agency responsible for the management of advertising on MZH's television channels and radio stations, being founded in 1975. Following the liberalization of the television market in the early 1990s, the agency was closed in 1995, with its duties being transferred directly to MZH.

Until 1990, MZH idents were distinct from the MZH television channels' brandings, being then adapted into the channels' respective brandings starting that year.