Aiki (合氣) means the defender blends without clashing with the attacker, then goes on to dominate the assailant through the application of internal strength or Ki energy to effect techniques.
Similar stances and the same word are used in other martial arts and traditional theater, including sumo and kyōgen.
Ichi-go ichi-e (一期一会, one time, one meeting) describes a cultural concept often linked with tea master Sen no Rikyū.
Katsu hayabi (勝速日, victory at the speed of light) is a highly developed state in which an aikido practitioner has reached spiritual and moral perfection, and becomes immune to violence.
The noun comes from the intransitive verb, kuzusu, meaning to level, pull down, or demolish.
As such, it refers to not just an unbalancing, but the process of getting an opponent into a position where his stability, and hence ability to regain compromised balance, is destroyed.
It is a term used widely in kendo, jujutsu, aikido, judo, karate and ninjutsu.
[6][7] In his later years, Ueshiba developed the more spiritual aspects of his art and even adopted the name Takemusu Tsunemori, under which he left many paintings and poems.
Zanshin (残心, remaining mind) refers to a state of awareness – of relaxed alertness.