Television Oita System Co., Ltd. (株式会社テレビ大分, Kabushiki-gaisha Terebi Oita, TOS) is a regional television broadcaster headquartered in Ōita, Ōita Prefecture, Japan that serves Ōita Prefecture as an affiliate of the Nippon News Network/Nippon Television Network System and Fuji News Network/Fuji Network System.

[1] TOS is the second commercial television station in Ōita Prefecture.

But due to the launch of Oita Asahi Broadcasting in 1993, the station became a dual NNN/NNS and FNN/FNS affiliate.

[4][5] Kansai Television and Yomiuri Shimbun are the main shareholders of TOS.

[6] TOS started broadcasting digital terrestrial television on December 1, 2006.