気剣体 (Ki Ken Tai) – The Spirit, Sword and Body


Ki ken tai is a fundamental principle in kendo and translates to ‘spirit, sword, body’. Before we go into how they work together in kendo, let’s look at them individually.
Ki
Ki, as defined by the All Japan Kendo Federation’s 1996 edition Japanese-English Dictionary of Kendo is,
“the basic energy which exists in all matter that is born, develops and dies. In human beings, it is the kinetic energy responsible for perception, sensation and instinct. In kendo, it refers to the environment surrounding one and his/her opponent, and it determines the relationship between one’s body and soul.”
Simply speaking, ki is your show of spirit. It is the energy you exert toward your opponent, the aura with which you surround yourself, the manner in which you conduct yourself, the will behind your strike, and the conviction of your actions after they have finished. The most obvious show of ki is our kiai 気合, but there are more subtle and equally important displays of ki as well.
When you stand before your opponent, even an opponent more powerful that you, it is important to surround yourself with a strong ki even before any movements are made. There can be several reasons for this.
First, elevating your own spirit bolsters your physical performance. It reduces doubt and nervousness that would otherwise hinder your awareness and reaction.
Secondly, a strong show of ki could momentarily throw off your opponent, giving you an opening with which to strike. When an opponent is met with a confident spirit, it changes how he or she will direct his or her attacks and might even cause hesitation.
Finally, and I’ll admit that this is a personal opinion, but meeting your opponent with a strong spirit says a great deal about how much you respect the other kendoka and the hard work and training they have gone through to get where they are. Fighting a strong and energetic opponent who gives every impression of wanting to engage you is a very rewarding experience, even if you come out on the losing end. Conversely, fighting an opponent who shows little or no interest in the match is in some ways similar to someone rudely and repetitively yawning in the middle of a story.
To achieve this, you must push your ki outward around yourself and toward your opponent, which I admit can be a difficult concept to understand at first. The easiest way to visualize this is to hold onto the thought “I am coming at you” and try to push that energy toward your opponent.
Far easier, however, is the kiai or the vocalization of spirit. The kiai should come from the stomach, not the throat. By forcing air up from your diaphragm and not from your chest, you produce a stronger, longer lasting shout that will carry over the entire court. Similarly, tension should be stored in the stomach, as opposed to the shoulders where it tends to accumulate.
We kiai first when we stand up to kamae with our opponent. This signifies both that we are ready and willing to fight, as well as giving us mental strength.
We also kiai when we strike our opponent. Specifically we shout the area in which we have struck or intended to strike. The reason for so obviously shouting where we mean to hit is twofold. One, it vocalizes our intent to strike, and two it gives the judges a clear way to assess whether that intent was met with success or not.
Finally, after a strike is concluded, we draw out our kiai to affirm that we hit what we meant to hit, and have no regrets. This is known as zanshin 残心 or remaining spirit. Draw the kiai out to its naturally fading end, but hold on to the remaining vestiges of the ki used to strike. It is important to remember that the conclusion of a strike does not mean the conclusion of the match. A counter strike is always a possibility and this remaining spirit keeps us alert and ready for whatever comes next.
All of these elements combine in the concept of ki as it relates to kendo.
Ken
Ken is the sword element of kendo. While the evolution of this martial art has taken us far from sharpened steel blades, that visualization is never far from the spirit of kendo. Kendo itself means ‘way of the sword’ 剣道.
Kendo, however uses shinai 竹刀, a practice sword comprised of four slats of bamboo bound together with leather to produce a light weight and flexible weapon that inflicts minimal damage. The shinai is the tool of kendo and should be treated with all the care and respect it deserves.
Our shinai are extensions of ourselves. We use them to feel and test our opponents ki and to check for strengths and weaknesses before we move to strike. We communicate with our opponents through our shinai whether we wish to our not.
We use these instruments in ways that could cause serious harm to our fellow practitioners if used incorrectly and so every care must be taken to ensure that our shinai are in safe physical condition before we begin a practice or a match. This includes regular maintenance and replacement if necessary.
Physical characteristics aside, just as we show our intent, our energy and our respect with our ki so too do we use our shinai. As paradoxical as it seems, though we must express fully our willingness and intention to strike, we must also bear in mind that we are striking a fellow practitioner.
With that in mind, care must be given at all times to be mindful of where we are placing our strikes and not to strike recklessly. While we wear bogu to protect ourselves in a match, a strike thrown wildly in frustration or carelessness can result in injury to our opponents. Perhaps the best example of this is the tsuki 突き strike which is a thrust to the throat. The target of tsuki is very small, and uses a thrusting technique that is unique to it alone, and thus, is not typically practiced as part of normal training. It is ill advised for new practitioners or those unfamiliar with the strike to attempt it in a match as failure to hit the correct target can result in a painful thrust to an un-padded portion of your opponent’s neck.
This isn't to say that we should be shy about striking our opponents. A kendo match has two independently thinking practitioners who are constantly moving and striking. It is common for strikes to miss their mark in such fast moving circumstances. However, awareness of where we are placing our strikes, and of where the target is and will be are just as important as showing our complete earnestness in our matches.
Tai
Tai refers to your body, how your present it, carry it and move it. Recently in practice I observed the sensei reprimanding an older practitioner for his slouched position while taking a break from keiko. Mention was made at the end that the body should be kept straight at all times during practice, even when one is taking a break.
This is a very good point to keep in mind. From the moment you step into the dojo, all efforts should be made to keep your body straight and squared. This has as much to do with cultivating a strong body as it does a strong spirit. It keeps you in the mindset of readiness and awareness in both mind and body.
While the shinai is the tool used to strike, without the body powering it, it is only a stick. Ideally when we face an opponent we do so with body straight but relaxed, mind clear and ready to react on reflex an instinct alone, both to our opponent’s advances and to his or her openings. 
It is almost like an out of body experience when this happens. Your body moves, it seems, without any command from your mind. This comes from muscle memory; the pay off from hours upon hours of repetitive motion and practice combined.
In practice, strict attention should be paid to balance, both literally in keeping oneself upright, and in ensuring that weight is distributed evenly, shoulders are level and the back is straight.
Ki Ken Tai no Icchi 気剣体の一致
Ki ken tai no icchi is the synchronization of the spirit, sword and body. For a point to be considered valid, a practitioner must express correct movement and intent with all three at the same time.
From a judging standpoint, this usually means that the hit connects at the same time that the lead foot hits the ground (fumi komi 踏み込み) and the practitioner vocalizes strongly the intended target. What we strive for is a firm, solid hit, an audible stomp of the lead foot and a strong kiai all at the same time.
In a less black and white way, ki ken tai no icchi describes all ways in which we harmonize our spirit, shinai, and body. It encompasses the timing of the swing, the momentum of the body, the calmness of the mind and the strength of intent all together. There is no easy way to exemplify this but it is nonetheless very important to the study of kendo, and correctness of it comes from many many hours of practice.

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