- iaido 居合道・いあいどう
- the art of drawing the Japanese sword
- iaito 居合刀・いあいとう
- training sword, usually not sharpened
- ichi 一・いち
- one
- ichiban 一番・いちばん
- first, best
- iie いいえ
- no
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- iki 意気・いき
- will power
- ikkajo 一ヶ条
- older term for ikkyo
- ikki 一気・いっき
- one ki, bottoms up, toast
- ikkyo 一教・いっきょう
- first teaching, pinning technique
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- ikkyo undo 一教運動・いっきょううんどう
- exercise of the basic ikkyo movement
- ippon 一本・いっぽん
- one point
- ipponken 一本拳・いっぽんけん
- strike with one knuckle (lit. one-point fist)
- irimi 入り身・いりみ
- entering straight into a technique as opposed to the more indirect entrance into technique called tenkan. In basic training, irimi usually looks like a step forward, straight or at an angle but usually ending with the body facing the attacker, rather than in the direction of the step. To enter with irimi, the defender needs to move in the very moment of the attack or even himself initiate it.
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- iriminage 入り身投げ・いりみなげ
- A technique where the defender enters linearly behind the attacker, gains the initiative and seizes him by the collar or neck with one hand while entering under the chin with the other arm and then downward to execute the throw.
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- Iwama 岩間・いわま
- Japanese town; where Osensei had a dojo and a home
- Iwama ryu 岩間流・いわまりゅう
- Saito Sensei’s Aikido style