Kogeki Bobi – The Unity of Offense and Defense

Kogeki  is a term meaning to attack or cut down and refers to offense and Bobi means defense. The term “Ko Bo Ichi” or “Kogeki Bobi” refers to the principle that offense and defense are one. Hundreds of examples exist that can be used to illustrate this concept.

Upper body shifting to defend and attack simultaneouslyOne example that collapses the distinction between Offense (Ko) and Defense (Bo) is Upper Body Shifting (Jo Taisabaki – shown right). Here, the body rotates in defense, and the same rotation drives the attacking punch.  Using this type of technique takes a thorough understanding of timing (Hyoshi) , distance (Ma-ai),  Initiative (Sen No Sen or Tai No Sen) and most obviously, confidence.

Blocks used to deflect an attack are used to break an arm at the same time , seriously degrade the opponent’s offensive capability, and collapse his structure (Kuzushi). In Kendo a number of terms describe the concept of attack and defense being equal by taking the center line where a downward cut is used to both block or deflect the opponent’s sword while striking at the same time. Examples include:

  • Kiri Otoshi – ‘Dropping Cut’ from Itto Ryu 
  • Gasshi Uchi – from Yagyu Shinkage Ryu
  • Hitotsu Tachi – ‘One sword’ from Kashima Shinto Ryu

Offense and defense can be considered as two separate entities, part of a spectrum, or something inseparable.

Short Time Slices Blur Distinctions

At the tactical and technical levels of strategy, smaller and smaller time slices between offense and defense transitions can merge the two. To fight this way requires strong ability, mental fortitude and flexibility, which shows a high degree of understanding. I remember when I was first introduced to fighting using Sanchin Dachi, a very short upright stance. A visiting senior instructor from another Dojo in Kumamoto was training with us. I learned very quickly that close in-fighting is incredibly fast and combined offense and defense at the same time. Punches were sticky and curved around my blocks like a snake only strike and at the same time prevent me from retaking the initiative. I came away with a very important lesson. Never underestimate small movements, and offense and defense really are the same.

There are many other examples of this concept. These short paragraphs do ill justice to the depth of this area of study. Look into your Kata and find it.


Excerpted and adapted from: Budo Theory: Exploring Martial Arts Principles

by Richard Rowell

Understanding Initiative – The Principle of Sen

retaking the initiative - naginata

We live in a cause and effect world, and combat is no different. Combat is a chain of causality. Cause and effect follow each other in another endless dualistic cycle. The concept of Initiative (Sen) as it relates to combat is something worth considering. Sen can mean to precede, precedence, prior, future, or ahead. It has variously been described as Initiative in Budo terminology. To Initiate – to cause or facilitate the beginning of.

What is Initiative?

Several questions immediately come to mind about Initiative:

  • What is the purpose of initiative?
  • Is there advantage or disadvantage to taking the initiative?
  • Do you have to move or attack first to have the initiative?
  • How do we regain the initiative if we have lost it?

I am going to suggest that the purpose of Initiative (Sen) is to gain advantage over your opponent. Conventional thinking suggests that by taking the first step\move (initiative), your opponent is forced to react to you and abandon his own plans at least temporarily. Initiative seems to indicate that by pre-empting your opponent’s actions, you have a higher probability of winning.

Like Boyd’s OODA loop, if you can get inside the opponent’s decision cycle, you Observe, Orient, Decide, and Act faster than your opponent. Which puts him on the defensive, gives him less time/fewer options to react while giving you more freedom. In other words, you spend more time shaping the engagement in your favor and your opponent spends more time detecting and reacting to your initiatives.

Several cycles of this type of engagement, with each one giving you greater and greater freedom of action while reducing that of your opponent, would make it appear that taking the initiative has significant advantages.

Of course, your opponent is trying to do the same to you; like trying to force each other into a corner. If you are in the corner, you have fewer and fewer directions to move. You want freedom in both space (to be able to move) and time (to decide when to move). In the corner, your opponent dictates your movement options and he has a wider grasp of time (he can choose to keep you in the corner, wait for reinforcements, or force you to fight until you are destroyed, break out, or surrender).

Therefore, it would seem that the answer to the first question above is that the purpose of Initiative (Sen) is to gain advantage in the physical dimensions of time and space, mentally, and spiritually while reducing that of your opponent.

Do We Always Need the Initiative?

However, what about the second question? We can see some advantages to taking the initiative, but what about the disadvantages? If we equate initiative with attacking, we are in for a surprise. If we move against a prepared opponent, he will be ready to exploit the Gaps (Suki) inherent in our movement (Ugoki no Suki) or technique (Waza no Suki) that he can anticipate.

For example, if the attack is weak (slow, uncoordinated or at the wrong time), or anticipated (the defender plans for it, or actually depends on it for his reaction), then moving first is not necessarily an advantage.

Attacking is only one of several options to gain freedom of action, but if you are in a corner, it may be the only one left. Winning not only involves attacking, but setting up other opportunities. With an opponent trying to do the same to you, the goal must always be to react or initiate in such a way as to recapture Opportunity and/or Advantage by exploiting Gaps (Suki). A good pool player not only makes his shot, but also sets up his next shot to increase his opportunities and maintain the initiative. If he cannot make the next shot, he tries to place the cue ball in a position that makes it very difficult for the opponent to sink the next ball.

Western military science has always asserted that defense is a stronger form of combat because the attacker is required to move and strike—activities which trade off against each other and expose inherent Kyo-Jitsu cycles that can be exploited. There are many examples in Eastern martial traditions that espouse “Waiting” (Tai). “Be struck to win.”

Some martial styles have predominately advocated one or the other, but in reality there has to be a balance between offence and defence. There is a time and place for each. Higher-level Budo concepts such as the idea that offence and defence are the same thing will be discussed later (Chapter 13 – Kogeki Bobi).

Does Initiative Mean Moving First?

Initiation (Sen) and Attacking (Kogeki) are not the same thing. Like a chess player, you can strategically shape the chess board before the final engagement. In modern parlance, it is called preparation of the battle space, and starts long before the first bullet is fired. To put this into an example of a one-on-one engagement, imagine walking down the street heading to your car after seeing a movie and ahead of you are two unsavory characters.

  • You have already been proactive (taking the initiative) by studying your style of martial art and learning how to fight.
  • You have situational awareness (Kan) to determine that things are potentially shaping toward a bad situation.
  • By moving across the street to a well lit area with several other people, you are less likely to be isolated, position yourself in an advantageous position before any potential combat, and more importantly, dislocate the preferred environment of the opponents.
  • You can elicit support from allies, other people, or get the phone out of your pocket and dial 911 without hitting the send button yet.
  • You can determine which of the two opponents is the highest threat, and target any significant weaknesses of the opponent.

With the above scenario, you have been taking initiative without ever attacking and increased your probability of a better outcome than if you did nothing. You are already applying one of the three main methods of retaking the initiative from your opponent. You are mentally moving faster than your opponent and that leads to tactical speed. So, in answer to our third question, you do not have to attack first to have Initiative.

Because combat is dynamic and fluid, you are not always going to be in a position of maintaining the initiative. Your opponent may be faster, stronger, or have a particular technique that is very strong. You need to dislocate his strengths and apply yours to his weaknesses (Kyo) at the right time. There are several fundamental ways in which the Initiative (Sen) is recaptured during actual combat, and they all involve time. So now we can move on to the fourth question we have postulated about Initiative (Sen). How do we regain the initiative if we have lost it?


Excerpted from Budo Theory: Exploring Martial Arts Principles

by Richard Rowell.

Terrain – A Tactical Analysis Of The Competition Area

Competition - tactical analysis

For the competition minded, a tactical analysis of the match areas for Karate, Judo, or Kendo can yield some interesting insights to how to deal with an opponent. The competition area is flat and usually square so there is no terrain to hide in or use for cover, but there is terrain that limits or enhances movement. If you have studied the game of Go then you will be able to appreciate corners, edges, and the center in both defence and offence.

Often in competition, you see two contestants circling each other, or one circling the other. Sometimes when the clock is ticking down, the person that is ahead in points circles to avoid combat and wastes time to win the match. The person that is behind wants to force interaction to try and catch up, but lets his opponent win at his strategy of letting time run out.


By eliminating opportunity for your opponent to circle, you can immediately and effectively limit the opponent’s freedom of movement to half the competition area (if he declines to attack) simply by shifting to cut off the circling (see figure). By shifting, you are using the edges of the competition area to support your flank and limit the opponent’s movement to that side. He is forced to circle the other way, attack or withdraw. Edges can also be effectively used to limit a strong opponent’s to attack on his preferred side (left or right).


A few more shifts and you can maneuver him into a corner. When your opponent is in a corner, he has to divide his attention between you and the match area boundary, which invites a mental Gap (Suki) that can be exploited if you chose to attack.

In a corner, two sides restrict movement. Your opponent has two options; he can either attack, or avoid. Avoidance can take two forms, 1. He can step out of the match area in which case he will get penalized, or 2. he can try to slip out one side. Using maneuver and just offering combat by shifting to block the opponent’s circling means you have degraded the opponent’s freedom of maneuver. Further degrading it into a corner now allows you anticipate a reaction—coming at you, stepping out, or in a moment of indecision your chance to attack. Depending on the opponent and his strength and weaknesses you can choose to attack or counterattack based on your preference.

Competition - tactical analysis

Using the center, edges and corners of the match area tactically.


Taking the centre of the match area can create a psychological advantage right from the start.  It also does not impede you because you are not affected by edges as much as the opponent who is forced toward them. Competition area geometry of the  at the tactical level can have great effects on the outcome of the match if you can capitalize on it—but first you must be aware of it. There are other ways to analyze the competition area tactically, I leave it up to you to discover.

Considering Terrain

One factor that we typically loose sight of in the Dojo in Tactics is the effective use of terrain. Not all combat is likely to occur in an area were there is a clear unobstructed area to maneuver, and terrain can be an advantage or disadvantage, depending on how you utilize or fail to utilize your environment.

Take these ideas outside competition and consider how your environment can create advantages and disadvantages. Edges such as a wall can limit movement but also protect your back in a scenario with several opponents. Many Kata consider confined spaces, such as using a sword in a narrow hallway.

Terrain is a major consideration in modern tactics, why should it be any different in the martial arts? There are literally countless examples of using terrain to advantage during combat. As one example, 17th century swordsman Araki Mataemon used a bamboo grove to his advantage while fighting Yamada Shiryukan who specialized in the Kusari-Gama (a sickle with a chain and weight attached). Yamada could not use the chain and weight effectively with all the bamboo stems and died at the hands of Araki. Mataemon functionally dislocated the Kusari-Gama’s advantage by luring his opponent into the bamboo. He used terrain to his advantage.

The use of terrain in combat includes, barriers limiting the opponent’s movement or protection against the opponent’s techniques. You can use terrain to hide your entire person or just part of your body etc. You may even find some of these ideas in your Kata. Karate Kata show ways of using sand, rocks, farm tools, boat oars and even turtle shells as ways to use the environment and terrain to your advantage, as well as night fighting and fighting on boats.

Application of some of these techniques include fighting along narrow pathways between rice paddies. Iaido has Kata that reflect limitations imposed by the environment, such as narrow hallways, obstacles overhead, and even friendly noncombatants. Even some Engagement Postures (Kamae) in Iaido are related to environmental constraints (e.g. Hasso no Kamae and Waki no Kamae).

Practice in different environments to get used to the variation in terrain. Not all fights will be in areas that are free from obstruction or allow freedom of movement. Think about how your martial art uses these ideas in relation to individual techniques, tactics, and a combination of both.

by Rick Rowell

Check out Budo Theory: Exploring Martial Arts Principles  for more ways to improve you martial journey.