Great Mazinger (1974)
Original title: グレートマジンガー
Great Mazinger is a 1974 Japanese-language animation series created by Go Nagai. It stars Keiichi Noda, Hidekatsu Shibata and Kenichi Ogata.
After Koji Kabuto and Sayaka Yumi leave to the USA, it's up to the rash orphan Tetsuya Tsurugi to pilot the next Mazinger robot: the Great Mazinger. Under the direction of Dr. Kenzo Kabuto and helped by his adoptive sister Jun Honou, Tetsuya battles the Miccene Empire.