- abara 肋・あばら
- The human rib cage, also known as the thoracic cage; a typical human rib cage consists of 24 ribs, the sternum, costal cartilages, and the 12 thoracic vertebrae. (cf. ribs – rokkotsu)
- ago 顎・あご
- Jaw
- agobone 顎骨・あごぼね
- Jawbone; mandible; also called gakkotsu
- ai 合・あい
- Harmony, unity, blending
- aihanmi 相半身・あいはんみ
- Basic relation between partners: both have same foot forward (left or right), cf. gyakuhanmi
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- aihanmi katatedori 相半身片手取り
- Wrist grip – right on right or left on left; also called kosadori; cf. gyakuhanmi katatedori

- aiki 合気・あいき
- Blended, or matched Ki. In Aikido, refers to the concept of blending physically and mentally with the attacker. Used in Daito-Ryu Aikijujutsu to refer to the perception and nullification of an opponent’s attack. An old term used in various martial arts.
- aikibatto 合気抜刀・あいきばっとう
- Sword exercises, solo or pair
- aikibudo 合気武道・あいきぶどう
- Budo based on the aiki principle; earlier name for Aikido
- Aikido 合気道・あいきどう
- A modern Japanese martial art developed by Morihei Ueshiba incorporating joint-lock and throwing techniques applied in self-defense with the intent of not injuring or causing only minimal damage to the attacker. The techniques of Aikido derive mainly from the Daito-Ryu Aikijujutsu of Sokaku Takeda. Philosophically, Ueshiba was greatly influenced by the views of Onisaburo Deguchi, leader of the Omoto religion. The art evolved gradually during the late 1920s and 30s under various names. Its modern name was officially adopted in 1942 as a result of the reorganization of Japanese martial arts by the Dai Nihon Butokukai. Its emergence as a major martial art and its spread outside of Japan took place after World War II.
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- aikidoka 合気道家・あいきどうか
- One who does Aikido, specifically on an advanced or professional level
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- Aikijinja 合気神社・あいきじんじゃ
- An Omoto shrine located in Iwama, Ibaragi prefecture erected in the early 1960s by Morihei Ueshiba which symbolizes his belief in Aikido as a spiritual discipline. Site of an annual ceremony presided over by Omoto priests held on April 29 (to coincide with the late Showa Emperor’s birthday, a national holiday) in commemoration of the death of Ueshiba (d. 26 April 1969). An older shrine no longer in use constructed c. 1943 still stands behind the present structure. Morihiro Saito was the shrine’s guardian from 1969 until his death in May 2002. The present Doshu Moriteru Ueshiba now assumes this title.
- aikijo 合気杖・あいきじょう
- Aikido jo exercises
- aikijutsu 合気術・あいきじゅつ
- Name of the Daito-Ryu martial art; also called aikijujutsu
- Aikikai 合気会・あいきかい
- The Zaidan Hojin Aikikai was established on 9 February 1948 and is the legal entity under which the Aikikai Hombu Dojo operates; organization and “label” for Ueshiba’s Aikido
- aikiken 合気剣・あいきけん
- Aikido sword exercises
- aikinage 合気投げ・あいきなげ
- Aiki-throw, throwing technique
- aikiotoshi 合気落とし・あいきおとし
- Aiki-drop, throwing technique
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- aikitaiso 合気体操・あいきたいそう
- Aikido warm-up exercises
- aite 相手・あいて
- Partner in training; opponent
- arigato ありがとう
- “Thanks” (informal)
- arigato gozaimasu ありがとうございます
- Thanks for something going on
- arigato gozaimashita ありがとうございました
- Thanks for something completed
- ashi 足・あし
- Leg; foot
- ashikubi 足首・あしくび
- Toes
- atama 頭・あたま
- Head
- ate 当て・あて
- Hit, strike
- atemi 当て身・あてみ
- Strike to the body
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- awase 合わせ・あわせ
- Harmonizing/blending movement
- ayumiashi 歩み足・あゆみあし
- Alternating steps, left and right, like normal walking