Story
TV series by Toei Animation — Fall 1972, 92 episodes, Finished.
Koji Kabuto’s grandfather has discovered two resources which can save humanity: Photon Light Energy and the ultra-impregnable alloy Chogokin Z. However, Dr. Kabuto’s research is abruptly cut off when the evil Dr. Hell sends his trusted lieutenant, the bisected Baron Ashura, to assassinate him! Koji, now orphaned along with younger brother Shiro, swear revenge using Dr. Kabuto’s last and greatest invention: the super robot Mazinger Z! Joined by Dr. Kabuto’s successor, Dr. Yumi, his daughter Sayaka, and her research robot Aphrodite A, Koji sets out to protect Japan from Dr.
Synopsis via AniList (English).
