Aikido is a modern Japanese budo (Art of War), developed by Morihei
Ueshiba between the 1920s and the 1960s primarily from Daito-ryu aiki-jujutsu.
Aikido is known for emphasizing the spiritual and philosophical development
of its students. This is a direct result of Ueshiba's background in
the Ōmoto-kyo religion. Aiki is a martial arts principle or tactic.
It typically describes an idea of oneness or blending in the midst of
combat. This principle finds expressions in such lethal concepts as ai
uchi ("mutual strike/kill"), but in aikido it generally describes
the more elevated notion of blending rather than clashing. Emphasis is
upon joining with the rhythm and intent of the opponent in order to find
the optimal position and timing with which to apply force. The techniques
of aikido can, when applied judiciously, divert or immobilize rather
than damage or kill. As a result, aikido can be considered to be a practical
symbol of meeting aggression (physical, verbal, etc.) with an effective
but merciful response, and finding harmony within conflict. Ueshiba declared, "To
control aggression without inflicting injury is the Art of Peace."