Pre-war Aikido
In the pre-war period, aikido was still in formation and had not yet established itself as a separate art from that of Daito-ryu aiki-jujutsu. However, it was fast attaining an identity of its own. In 1942, the Dai Nihon Butokukai, in its efforts to standardize Japanese martial arts, came to an agreement with representatives of Ueshiba's school that the name aikido would be used to refer to the jujitsu derived art form Ueshiba had brought to prominence.
Read more about this topic: Aikido Styles