Steel Jeeg, more commonly known as Kotetsu Jeeg or Koutetsu Jeeg, is a super robot anime and manga series created by manga artists Go Nagai and Tatsuya Yasuda. The anime TV series was produced by Toei Doga. It was first broadcast on Japanese TV in 1975. The series lasted for 46 episodes. Steel Jeeg also ran as a manga in several children's publications. A sequel series called Kotetsushin Jeeg aired on the satellite network WOWOW, beginning April 5, 2007.