The story
In the 1990s, the opening of new Heisei stations led to the growing impetus for the creation of a third commercial television station in Aomori Prefecture. The Asahi Shimbun invested in ABA's establishment and had its launching costs evaluated at approximately six billion yen.
October 1, 1991 - Station launch.
July 1, 2006 - Start of digital terrestrial television service (Aomori main station).
July 24, 2011 - All analog TV stations were abolished.
From Wikipedia’s article on Asahi Broadcasting Aomori, shared under CC BY-SA 4.0.4