- kaeshi/gaeshi 返し・かえし
- returning, reverse
- kaeshitsuki 返し突き・かえしつき
- reverse strike with jo-staff
- kaeshiwaza 返し技・かえしわざ
- counter techniques
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- kagami biraki 鏡開き・かがみびらき
- Japanese New Year celebration
- -kai 会・かい
- club, association
- kaiso 開祖・かいそ
- founder; O-Sensei
- kaitennage 回転投げ・かいてんなげ
- Rotary throw. Technique where the attacker is thrown forward with pressure applied on the head or neck while his arm is raised over the head.
Aikido Audio clip: Flash 9+ needed

- kaitenosae 回転押さえ・かいてんおさえ
- rotation pinning technique
- kakaedori 抱え取り・かかえどり
- embrace
- kakarigeiko 掛かり稽古・かかりげいこ
- attack in a line one, after the other
- kakudo 角度・かくど
- angle
- kamae/gamae 構え・かまえ
- guard position
- kami 神・かみ
- divinity
- kamiza 上座・かみざ
- honorary place in a dojo, compare shomen and shinzen
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- kampai 乾杯・かんぱい
- “cheers”; a toast
- -kan 館・かん
- institution
- kangeiko 寒稽古・かんげいこ
- mid-winter training
- kanji 漢字・かんじ
- ideograms, the Chinese writing
- kanren 関連・かんれん
- linked, connected
- kanrenwaza 関連技・かんれんわざ
- linked techniques, one technique followed by another, compare renzokuwaza
- kansetsu 関節・かんせつ
- joint (on body); e.g. elbow joint, knuckle
- karatedo 空手道・からてどう
- the way of the empty hand, or the way through the hand to emptiness
- kata 型・かた
- form; predetermined movements
- kata 肩・かた
- shoulder
- katadori 肩取り・かたどり
- shoulder grip

- katadori menuchi 肩取り面打ち・かたどりめんうち
- shoulder grip followed by shomenuchi

- katakana 片仮名・かたかな
- Japanese phonetic writing; cf. hiragana
- katamewaza 固め技・かためわざ
- pinning techniques
- katana 刀・かたな
- the Japanese sword, also ken, to and tachi
- katate 片手・かたて
- one-hand technique
- katatedori 片手取り・かたてどり
- wrist-grip

- katate ryotedori 片手両手取り・かたてりょうてどり
- grip with both hands, also called morotedori

- katori 香取・かとり
- shinto-ryu traditional sword school

- keiko/geiko 稽古・けいこ
- training
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- keikogi 稽古着・けいこぎ
- training dress, also dogi
- ken 剣・けん
- sword, also katana, to and tachi
- kendo 剣道・けんどう
- Japanese fencing
- ki 氣・き
- spirit, life energy
- kiai 気合・きあい
- gathered ki; scream; yell; gathered spirit
- kibadatchi 騎馬立ち・きばだち
- horse-riding stance
- kihon 基本・きほん
- basics
- kihonwaza 基本技・きほんわざ
- basic training
- kime 決め・きめ
- focus; the instantaneous tensing at the correct moment during a technique.
- kimusubi 気結び・きむすび
- tying one’s ki to that of the partner
- ki-no-nagare 気の流れ・きのながれ
- Flowing Ki
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- kiri/giri 切り・きり
- cut
- kirikaeshi 切り返し・きりかえし
- turning cut, sword exercise
- kogeki 攻撃・こうげき
- attack; strike; offensive
- kohai 後輩・こうはい
- one’s junior, compare sempai
- koho kaiten ukemi 後方回転受け身・こうほうかいてんうけみ
- backward rolling breakfall
- kokoro 心・こころ
- spirit; will; heart; intuition; mood; also called shin
- kokyu 呼吸・こきゅう
- breathing
- kokyudosa 呼吸動作・こきゅうどうさ
- seated breathing and throwing practice
Aikido Audio clip: Flash 9+ needed


- kokyuho 呼吸法・こきゅうほう
- breathing techniques; breath control
- kokyunage 呼吸投げ・こきゅうなげ
- breath throw
Aikido Audio clip: Flash 9+ needed
- kokyu ryoku 呼吸力・こきゅうりょく
- breath power
- konbanwa 今晩は・こんばんは
- “Good evening” (when entering the dojo)
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- konnichiwa 今日は・こんにちは
- “Good afternoon/day” (when entering the dojo)
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- kosa 交差・こうさ
- cross over; pass
- kosadori 交差取り・こうさどり
- cross-over grip; same as aihanmi katatedori

- koshi 腰・こし
- hip
- koshinage 腰投げ・こしなげ
- hip throw
Aikido Audio clip: Flash 9+ needed
- kote 小手・こて
- wrist
- kotegaeshi 小手返し・こてがえし
- reversed wrist throwing technique
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- kotehineri 小手捻り・こてひねり
- twisted wrist; arm-locking twist down; sankyo
- kotemawashi 小手回し・こてまわし
- turned wrist, nikyo
- kotai 固体・こたい
- hard body, static training; also called gotai; c.f. jutai, ryutai and ki-no-nagare
- ku 九・く
- nine
- kubi 首・くび
- neck
- kubikyusho-uchi 首急所打ち・くびきゅうしょうち
- neck vital-point strike
- kubishime 首絞め・くびしめ
- neck choke
Aikido Audio clip: Flash 9+ needed
- kuden 口伝・くでん
- oral tradition/teaching
- kumi 組・くみ
- group, set
- kumijo 組杖・くみじょう
- jo exercises; jo against jo
- kumitachi 組太刀・くみたち
- sword exercises; sword against sword
- kumite 組手・くみて
- empty handed fight
- kuzushi 崩し・くずし
- break balance; to destroy; to pull down
- kyo 教・きょう
- principle, learning
- kyoshi 教師・きょうし
- title in kendo, 6-7 dan
- kyu 級・きゅう
- grades before blackbelt; cf. dan
- kyudo 弓道・きゅうどう
- the way of the bow and arrow

- kyujo 急所・きゅうしょ
- vital-point