Mainichi Broadcasting System, Inc. , or MBS, is a radio and television broadcasting company headquartered in Osaka, Japan, affiliated with Japan Radio Network (JRN), National Radio Network (NRN), Japan News Network (JNN) and TBS Network, serving in the Kansai region.

TBS Holdings, Inc., (formerly Tokyo Broadcasting System Holdings, Inc., is a Japanese media and licensed broadcasting holding company. It is the parent company of the television network TBS Television and radio network TBS Radio. It has a 28-affiliate television network called Japan News Network, as well as a 34-affiliate radio network called Japan Radio Network.