UFO Robot Grendizer (Japanese: ＵＦＯロボ グレンダイザー | Hepburn: Yūfō Robo Gurendaizā | also known as Grandizer) is a Japanese animated television series and manga created by Go Nagai. The series is the third entry in the Mazinger series, later relegated into a spinoff series. The series, produced by Toei Doga (now Toei Animation) and Dynamic Planning, is directed by Tomoharu Katsumata and written by Shozo Uehara. It aired on Fuji TV from October 5, 1975, to February 27, 1977. The robot's first appearance in the United States was as a part of the Shogun Warriors line of super robot toys imported in the late 1970s by Mattel, then in Jim Terry's Force Five series.