Ueshiba sensei studied several forms of jujutsu (Tenshin Shinyo Rio, Rio, Kito Ryu, Aioi Yagyu Ryu, Shinkage ryu), judo, as well as Hozoin-Ryu sojitsu (spear) and Kendo (art of sword). However, it was his meeting with Takeda sokaku that proved decisive for the creation of Aikido. According to various sources, Ueshiba studied under Takeda from 1915 to 1922 and received his kyoju dairi certificate (official property of the instructor of Daito-Ryu Aiki Jujitsu). As Ueshiba himself narrates “… Takeda opened my eyes to Budo ” (Interview with Morihei Ueshiba and Kishomaru Ueshiba , published in Aiki News # 18, August 1976). Many things can be said about the origins and evolution of Aikido, but the basic directions and techniques have been greatly
influenced by the teachings of aiki-jujutsu of Takeda. The term Aikido came into use around 1942-1943. Before that, Ueshiba sensei taught his craft under various names (aiki-jujutsu, Ueshiba Ryu, Aϊki-budo).
Until 1950 Aikido was hardly known outside Japan. It first appeared in France (1951 and 1952), then, USA (1953), United Kingdom (1955), Italy (1964), Germany (1965), By then, Aikido has spread, mainly through Aϊkikai trainers, and today it is practiced by thousands of people worldwide.