Grendizer Giga (グレンダイザーギガ) is a Japanese comic book series created and drawn by cartoonist Go Nagai. It is a remake of the original UFO Robot Grendizer in commemoration of its 40th anniversary. The cartoon was serialized from 2014-09-19 (cover date #2014-11) to 2015-07-19 (cover date #2015-09) in Akita Shoten's magazine Champion Red. The series was compiled in two standalone books published by Akita Shoten.