Another genre known as mecha came into being at this time. Some early works include Mazinger Z ( 1972 - 74 ), Science Ninja Team Gatchaman ( 1972 - 74 ), Space Battleship Yamato ( 1974 - 75 ) and Mobile Suit Gundam ( 1979 - 80 ). These titles showed a progression in the science fiction genre in anime, as shows shifted from more superhero-oriented, fantastical plots to somewhat more realistic space operas with increasingly complex plots and fuzzier definitions of right and wrong.