J9 Series

The J9 Series (J9シリーズ, Jei Nain Shirīzu^?) is a trilogy of Japanese Super Robotmecha anime television series. The anime were broadcast by TV Tokyo (TX Network) from 1981 to 1984, the 80's trilogy was animated by Kokusai Eiga-sha and produced by Movie International Co.Ltd. In 2014, a fourth series was announced to be in production for a 2016 release, with the original creative and production team reunited after 30 years.

Each of the anime broadcast featured a team of robot pilots variably known as "J9" whose role changed from series to series. Each was also advertised as being the "robot anime version" of another popular fictional motif. In each series, the cast of heroes were voiced by Kazuyuki Sogabe, Kaneto Shiozawa, Katsuji Mori, and Yōko Asagami.

Yu Yamamoto was head screenwriter for all three series, and Masayuki Yamamoto composed the theme songs for the trilogy, as well. Music was also an overarching motif in the series, with the eyecatch always featuring the team leader playing some sort of musical instrument (Blaster Kid and a double-neck electric guitar in Braiger, Billy the Shot and a keytar in Baxinger, and Nukiuchi Rock and a harmonica in Sasuraiger).

Yu Yamamoto later revealed that he had named the series after Sony's flagship SL-J9 Betamax video player, which at the time was out of his price range.

...
Wikipedia