Chogokin

Chogokin (超合金, Chōgōkin, Chō: Super, gōkin: alloy) Sometimes spelled either Chougokin or Cho-gokin is a fictitious material which first appeared in Go Nagai's Mazinger Z manga and anime and is later adopted by Popy in 1972 as the name of a new line of die-cast metal robot and character toys sold in Japan - the first of these is "GA-01" Mazinger Z, which, in spite of questionable engineering that led Popy to offer a free replacement campaign, ignited a craze that changed the face of the Japanese toy industry in the 1970s. Bandai, the parent of Popy, continues the Chogokin line to this day, branded under their own name.