Short answers, pulled from the story.
TV Asahi is a Japanese television station broadcasting on channel 5 in the Kanto region, designated by the callsign JOEX-DTV. It is the flagship station of the All-Nippon News Network and is owned by a wholly-owned subsidiary of The Asahi Shimbun Company. Its studios are located in Roppongi, Minato, Tokyo.
TV Asahi, then called Nippon Educational Television (NET), signed on at 9:55 a.m. Japan Standard Time on the 1st of February 1959. It began with at least 6.5 hours of programming per day, which expanded to 10 hours by April of the same year.
The network changed its name to TV Asahi on the 1st of April 1977, reflecting The Asahi Shimbun's emergence as the broadcaster's dominant shareholder and operational controller. Before that, the station had already shortened its on-air identity to NET TV in December 1960 as it transitioned away from educational programming.
TV Asahi has been the home of both Kamen Rider and Super Sentai since their earliest runs. Kamen Rider premiered on the network in April 1971, breaking a years-long tokusatsu duopoly held by TBS and Fuji Television. Super Sentai began on the network with Himitsu Sentai Gorenger in April 1975, and the franchise has continued on TV Asahi ever since.
TV Asahi's station director Koshiji Miura used his personal connection with Ivan Ivanovich, head of the Japanese Section of the Soviet Communist Party's International Department, to meet directly with Soviet leader Leonid Brezhnev. The resulting deal gave TV Asahi exclusive Olympic broadcast rights, the first time a private Japanese station had held them exclusively. Japan's boycott of the Moscow Games severely limited what could be aired and caused significant revenue losses.
British design collective Tomato created TV Asahi's current branding in 2003, working with the station's in-house design team. The system uses computer-generated "sticks" that shift in color and movement. Some Tomato members also perform as the electronic music group Underworld, whose tracks Born Slippy.NUXX and Rez were used as TV Asahi's sign-on and sign-off music.