Aikido is based on the martial art of DaitÅ - ryÅ `` Aiki-j Å `` jutsu , but began to separate from it in the late 1920s , partly due to Ueshiba 's involvement with the Å moto-ky Å religion . Aikido derives mainly from the martial art of DaitÅ - ryÅ `` Aiki-j Å `` jutsu , but began to diverge from it in the late 1920s , partly due to Ueshiba 's involvement with the Å moto-ky Å religion .