 It emphasises protecting the opponent and promotes spiritual and social development.The technical curriculum of aikido was derived from the teachings of Takeda Sōkaku; the basic techniques of aikido stem from his Daitō-ryū system.In the earlier years of his teaching, from the 1920s to the mid-1930s, Ueshiba taught the Daitō-ryū Aiki-jūjutsu system; his early students' documents bear the term Daitō-ryū.