The were three Super Robot

Super Robot

is a term used in manga and anime to describe a giant robot or mecha, with an arsenal of fantastic super-powered weapons, extreme resistance to damage unless the plot calls for it, sometimes transformable or combined from two or more robots and/or vehicles usually piloted by young, daring heroes,...

 anime

Anime

is the Japanese abbreviated pronunciation of "animation". The definition sometimes changes depending on the context. In English-speaking countries, the term most commonly refers to Japanese animated cartoons....

 series created by "Saburo Yatsude" (a collective name for the staff at Toei) and directed by Tadao Nagahama

Tadao Nagahama

Tadao Nagahama was a director of both puppet shows and animation.He is best known as the director of Toei's Romantic Trilogy, which added human drama to the Super Robot Genre....

 from late 1976 through early 1979. The trilogy was a co production between Sunrise

Sunrise (company)

is a Japanese animation studio and production enterprise. It is a subsidiary of Namco Bandai Holdings. Its former name was Nippon Sunrise, and prior to that, Sunrise Studios...

 and Toei Animation

Toei Animation

Toei Animation Co., Ltd. is a Japanese animation studio owned by Toei Co., Ltd. The studio was founded in 1948 as Japan Animated Films . In 1956, Toei purchased the studio and it was reincorporated under its current name...

. The series are notable for developing ideas from Raideen the Brave, helping the super robot genre evolve, from series meant mainly to sell toys, with little to no plot or character development from episode to episode, into series capable of telling drama

Drama

Drama is the specific mode of fiction represented in performance. The term comes from a Greek word meaning "action" , which is derived from "to do","to act" . The enactment of drama in theatre, performed by actors on a stage before an audience, presupposes collaborative modes of production and a...

tic stories of human conflict and compassion.