The Development of the JDJ Jujutsu Grading System Part 3.7: 8th Kyu

Okay, back on track.

The previous post (before the last post) looked at the first grading in the mon system for adults - 9th kyu. This post looks at the second grading in that system - 8th kyu, red and white belt.

Btw, if you're looking for quality belts and gi for your students at reasonable prices, see Ray Hana's Martial Arts Superstore.

Breakfalls (Ukemi)

Forwards roll, backwards roll, sideways roll, bridgefall, backwards roll over an obstacle, forwards roll over an obstacle, backwards flat over an obstacle, and sideways flat over an obstacle.

The new introduction is bridgefall, also referred to by Jan de Jong (JDJ) as o mae ukemi (major front breakfall). This technique was the subject of a 2010 post in which a video of the technique is posted.

Just as with sideways roll, this technique would appear to be relatively unique to JDJ's teachings, following a Google search and personal experience. 

In a 2010 post, I tell of an experience while teaching with JDJ in Sweden. JDJ demonstrated a 'hip turn' technique which I 'broke my fall' with o mae ukemi. During the break (no pun intended), I was approached by the seminar organiser, an instructor of a jujutsu school, and asked to teach him, not the hip-turn technique but the o mae ukemi to land safely from the execution of the technique. He had never heard of it or seen it before.

A point of differentiation that might be emphasised in the teachings of the jujutsu taught by JDJ, if it is understood by those teaching the jujutsu taught by JDJ.

The introduction of an obstacle for some of the breakfalls demonstrated in the previous grading is an increase in degree of difficulty over the previous grading.

Basic Blocks and Attacks (Uke and Atemi)

Front roundhouse kick, back side drive kick, and front side drive kick. Solo demonstrations. No blocks are included in this section.

A useful inclusion/replacement in this section could be Yoseikan Budo's (YB) sambo geri or yonbo (?) geri. These are exercise or kata that are used to teach three and four kicks respectively. I have found it a very useful exercise to teach, particularly in that it necessitates lifting the knee to stay balanced. Kicking skills are not great in most of those who trained exclusively within the JDJ jujutsu tradition. These kicking skills could be enhanced, based on experience, by training to lift the knee when initiating a kick, which the correct teaching of this kata teaches.

Last year I was assisting ikkyu graded jujutsuka in the JDJ tradition and introduced sambo geri to them. They could not perform the kata/kicks. This is representative of the kicking skills in the JDJ jujutsu, and aikido, tradition. Train your kicks people, and you might have to look outside your school to learn and train how to kick, as I did.

You will recall from the previous post, sambo geri was included in the ikkyu 'Basics' grading which then became the nikyu kime no kata/revision grading. Sambo geri was replaced by JDJ's wakai no kata which is included in the next grading, 7th kyu (part of the mon system), red belt.

Happoken no Kata

As has been stated before in numerous posts, this is a straight-up YB kata. JDJ changed the stances used in the kata which led to questions about the first block. Why is the middle block used when the taisbaki, evasive body-movement, has taken care of the injurious contact with body problem (see post 3.4)?

Last year, I saw a JDJ ryuha yudansha teaching this kata. They clearly had no understanding of the kata. The kata has four different strikes and four different blocks. The aforementioned yudansha was using basically the same striking technique for three of the four strikes.

Said yudansha also had no concept of the timing of the kata. It should be, 1,2 stop. 1,2 stop. 1,2,3,4 stop. Not 1,2,3,4,5,6,7,8 stop. This was a common problem with the kata and kambangan (pencak silat kata) in JDJ's school. It was a race from the beginning to the end. This compromised techniques and what the exercise was supposed to be teaching. Taking the lead from the Setia Hati pencak silat that I introduced JDJ to and which he began to teach his pencak silat instructors and through them his students, the kata and kambangan were broken down into their constituent parts and trained separately before being put back together again for the complete kata/kambangan. In this way the timing was corrected and the techniques improved.

Another issue is that happoken no kata is only taught and trained as a grading requirement. Once completed, it is hardly, if ever, trained again. Should happoken no kata be examined at the end of the kyu system, ikkyu, to see if the candidate has improved their technique and understanding?

Body Movements (Taisabaki)

'Defender's choice of attack, using any block'

The issue of 'blocks' has been covered in a number of previous emails.

Flowing with front snap kick, entering, entering rotation, major entering rotation, sliding. The first three taisabaki were demonstrated in the previous grading. A progression with the flowing technique is the inclusion of a front snap kick. The final two taisabaki are new inclusions and complete the YB basic taisabaki.

Unbalancing (Kuzushi)

Normal single grip on sleeve (low) - Normal unbalancing - atemi

Normal single grip on sleeve (high) - Reverse unbalancing - atemi

Front both wrists grip - Same side unbalancing - atemi

Rear single wrist grip and strangle - Rear unbalancing - atemi

Normal, same side, reverse, and rear unbalancing are the basic unbalancing techniques from hand grips taught by YB.

Why is atemi included with each unbalancing? What is being examined in this unbalancing section? This is a classic example of a lack of understanding re the YB division of a defence into phases. The stance and positioning when executing the atemi means that this unbalancing demonstration is not necessarily helping when these unbalancing techniques are used within the grading system, other than when finishing with an atemi.

Locking Techniques (Kansetsu Waza)

'Two attackers, defender's choice of attack'

The inappropriateness of this stress grading to demonstrate the learned kansetsu waza has been discussed in a previous post.

The previous grading included wrist twist, arm turning, and body set arm breaking techniques. This grading includes wrist crush, variant arm entanglement, forearm twist. These techniques cover six of the nine basic kansetsu waza taught by JDJ jujutsu (and YB). 

Basic Blocks and Attacks (Uke and Atemi)

Different moving attack with flowing-brushing block-punch, entering-brushing block-punch, entering-double block-punch, flowing-brushing block-punch.

This is not the Unbalancing (Kuzushi) - Blocking (Uke) section introduced in the previous grading, even though brushing block was included in that section in the previous grading. As it is, this is a demonstration of a defence and not a part of the division of defences into phases.

Reflex (Shinken Shobu no Kata)

There are 10 attack-defence combinations included in this section of the grading. Nine of the 10 defences require a joint-locking technique to be demonstrated. The joint-locks include the three demonstrated in the previous grading and the three demonstrated in the above section in this grading, albeit against two attackers and so not assessed for their technical proficiency on their own.

The final defence is agains a stick - overhead attack. Last year I observed a JDJ ryuha class on multiple occasions where a stick - overhead attack was included in the training. The attacker had no idea what they were doing. They were attacking with the butt end of the stick, thus changing the distancing which in term affects the defence. 

The attack should be taught first and then teach the defence. If the attack is flawed, so will be the defence. The defender will become really proficient in defending against a flawed attack, which will probably mean that it will be ineffective against a real attack that is intended to do harm.

The Development of the Jan de Jong Jujutsu Grading System Part 1.2: Historic Ikkyu Part 1: Basics and Current Nikyu Part 1: Kime no Kata

This post follows on from the post, Part 1: The Kyu System.

You will recall from that post that the original Jan de Jong (JDJ) grading system consisted of only the kyu grades, which was a one-off grading system when it was developed. Start to finish, nothing else to follow or precede. That is it! Done and dusted (in the voice of Al Pacino in The Heat).

The image to the right is of a historic grading sheet regarding the requirements of the ikkyu grade which the recipient of my gifting of historical records was kind enough to forward to me based on this series of posts.

In the above linked post, I argued that the ikkyu grading was an instructor grading. That argument is supported by the heading to the above historic grading sheet: Ikkyu (Kyoshi) Instructor. 

All those that attained ikkyu are instructors in JDJ's original grading system, and it could/should be argued that they are instructors under the current system which includes the dan grades. It could/should be argued that they should be referred to as sensei rather than sempai as they are now, given that that is how the ikkyu grading was developed.

Part 1: Basics in the above ikkyu grading requirements reflects the Yoseikan Budo (YB) influence introduced into the grading system, therefore, this grading was introduced post 1969 when JDJ trained for a short time at the YB dojo in Japan (also see below). 

At some stage, the ikkyu Part 1: Basics became nikyu Part 1: Kime no Kata. 

Kime no kata is referred to as 'revision' in JDJ's jujutsu grading system. So the ikkyu Part 1: Basics became a revision grading when it was moved to nikyu, but what is it revising? It is revising the YB inspired mon grades with the ikkyu Part 2: Kime no Kata in the above image being a true revision of the kyu grades. That grading requires the grading candidate to select defences from the kyu grades in the nominated sections in that gradings. 

All of the techniques in Part 1: Basics are YB techniques, including Itsutsu no Kata, Happoken, and Sambogeri. When ikkyu Part 1: Basics becomes nikyu Part 1: Kime no Kata, Happoken and Sambogeri were replaced by Wakai no Kata.

Happoken is a YB kata designed to teach striking and blocking skills.

Sambogeri is a YB kata/exercise designed to teach kicking skills (see image right from Mochizuki's book). In future posts, I will be suggesting that Sambogeri and derivations thereof be introduced into the mon grades to improve the kicking skills of JDJ jujutsuka, which are generally substandard unless the student trained in a percussion based martial art.

Wakai no Kata is a kata that JDJ developed to teach striking, blocking, and kicking skills, along with different stances. Wakai no Kata will be the subject of a future post when exploring the mon system. In that post I will explain why it tends to be poorly performed in the JDJ tradition, even by the majority of instructors.

The abovementioned generous provider of the historic grading sheets also commented:

After doing the nikyu revision, Greg Palmer came up to me and said "you have me to thank for that grading". The Boss has tasked him with developing an assessment for those who hadn't done the mons. Further cementing the case for Greg to have been a yondan on completion of sandan.

I argued in the first post of this series that Greg Palmer was the best teacher at the school because he was a trained and qualified teacher, and I don't mean in a martial arts system which is basically amateurish. I was unaware that Greg developed this grading, however, it makes sense because it is a coherent introduction, not revision as suggested above, to the YB system that forms the basis of the mon grades.

With regards to Greg and the awarding of yondan upon completion of the 'technical' grades in the JDJ jujutsu grading system. I would go further than the above commentor and argue that Greg was entitled to be graded rokudan along with the anointed trio. 

Greg's contribution to the grading system far exceeded that of any of the trio, including introducing JDJ to a mindset of progressive gradings. It is generally acknowledged that his understanding of techniques and how to teach them exceeded that of the trio. He also selflessly taught for JDJ for nearly 40 years with no remuneration, unlike two of the trio. He was also the first and only to have established a branch outside the metropolitan area for JDJ.

You will recall in a previous post that I shared an insight that I had gained through studying the development of the JDJ jujutsu grading system, and that is that the instructors teaching the mon grades may not have actually gone through the mon grades. The above comment would appear to confirm that.

In that case, the nikyu revision, as the above provider described it, was not a revision grading for those that did not go through the mon system. It is an introduction to the mon system. It features the YB division of a defence into phases: taisabaki, kuzushi, waza (body-movement, unbalancing, technique). It features the five basic YB taisabaki, their basic kuzushi from hand grips, and their nine basic kansetsu waza (joint-locking techniques) as waza. 

Did the instructors who did not go through the mon system understand that these were phases in a defence? Did JDJ? This might explain some/many of the issues that I have and will be raising in connection with the mon grades and the teaching thereof.

The Development of the Jan de Jong Jujutsu Grading System Part 3.6: 9th Kyu (First Adult Grading in Mon System)

The beginning of the mon system for adults is 9th kyu, brown and white belt. This post will look at the 9th kyu grading.

You will recall from a previous post that the grading is made up of various sections. The following will consider each section. The initial reference point will be the gradings published in Jan de Jong: the man, his school and his ju jitsu system (Jan de Jong Self Defence School, 1995).

Breakfalls (Ukemi)

Six types of ukemi are demonstrated: (1) forwards, backwards, and sideways rolls, and (2) forwards, backwards, and sideways flats.

1. All of the ukemi, except for sideways roll, are taught in judo (see point 5 below). Most jujutsu schools take their ukemi from judo.

2. Sideways roll is unique to the jujutsu taught by Jan de Jong (JDJ), and it should be taught as such. This is a clear point of differentiation between the jujutsu taught by JDJ and that of all other jujutsu, aikido, and judo teachings. (Marketing 101 - differentiate the product).

I found a 'sideways roll' included in the door-stopper of a book by Marc Tedeschi, Hapkido: Traditions, Philosophy, Technique (2000; 1136 pages, over 9000 photographs). The sideways roll included in Tedschi's book is a barrel roll: starting on all fours, roll sideways and back up to on all fours.

3. Sideways roll as taught by JDJ is best described in terms of the old-school parachute landing involving sequential impact with the landing surface of body parts from the ankle to the shoulder thus reducing the force to be absorbed by the body per unit area and per unit time (see my book on the science behind all fighting techniques).

I did find a similar roll in Kreighbaum and Barthels (1996), Biomechanics: A Qualitative Approach for Studying Human Movement. Apparently this type of sideways roll is taught in volleyball.

4. Sideways roll is generally taught and demonstrated very poorly in the JDJ tradition. Starting off the roll on a flat foot generally results in a sideways flat that transitions into a backwards roll. Jumping into the roll often ends up with the same result. I teach to start off on the edge of the foot with the body arced in a 'C' position with the hip leading and shoulders leaning away from the direction of the fall. This forces the person to have sequential body parts impact (ankle, calf, thigh, hip, shoulder) before transitioning into a backwards roll. An important factor is, as with so many techniques, the direction the practitioner looks when executing the technique. Look at the ground and the body turns forward towards the ground. Look straight ahead or slightly to the other side, and the body stays side-on, thus executing a true sideways roll.

5. Kaiten ukemi (rolling breakfalls) are taught within the JDJ tradition such that the technique ends with the individual facing their opponent. This is a jujutsu approach compared to a judo approach, according to Pat Harrington in Principles of Jujutsu (1997) and Eddie Ferrie in Ju-Jitsu: Classical and Modern (1990):

The major difference between the forward breakfall in judo and jujutsu is the way jujutsu exponents come to their feet facing in the direction from which they have just fallen. It is standard practice to roll and come to your feet, simultaneously turning to face your opponent in a defensive guard. Judoka, on the other hand, roll, stand up and usually carry on walking. (Ferrie 1990, 33)

Judo teaches to walk away (not face the attacker) with kaiten ukemi. It has been suggested that this reflects the lack of combative focus in judo teachings. Do rather than jutsu. The same suggestion has been raised with respect to aikido when kaiten ukemi is taught in the same fashion.

JDJ included the 'judo' approach to kaiten ukemi in the instructors class. Why not include the judo approach in the mon grades? If nothing else, it increases the tactical options for students when regaining one's feet from a kaiten ukemi.

One of the exercises I use when teaching kaiten ukemi involves a person pushing another who executes the kaiten ukemi while the 'pusher' walks towards that person. This demonstrates that one needs to rise to their feet rapidly when used in a defensive situation. Often the person was very close when the person rose to their feet, because of the execution of the kaiten ukemi. One option is to adopt the judo approach in order to create distance between the 'attacker' and defender before turning to face them. The other is the slow rise to the feet is often a product of where the person is looking when they are exiting the roll. Throw your head back to immediately seek out the attacker and the body follows.

Greg Palmer and Peter Templeman (two JDJ yudansha instructors) told of how they did not sustain injuries when coming off a motorcycle at speed because of their kaiten ukemi training. The told of mae kaiten ukemi, ushiro kaiten ukemi, ushiro kaiten ukemi, yoko kaiten ukemi, etc. Only one mae kaiten ukemi - why? Because if the only way you've been taught kaiten ukemi is the 'jujutsu way', it rules out mae kaiten ukemi after any initial use as the person will always be facing the direction from which the fall commenced.

The secret for teaching the jujutsu and judo kaiten ukemi ways? Either a figure-4 or parallel leg arrangement. It's as simple as that. And don't forget where the performer looks.

Basic Blocks and Attacks (Uke and Atemi)

The four blocks are karate style blocks demonstrated solo (high, middle x 2, low: see a previous post).

The two attacks are front snap kick and punch with step. 

I recently saw a video prepared for student instruction where the JDJ ryuha yudansha was demonstrating a front snap kick/front kick. Their attempt to kick high resulted in their toes not being pulled back so as to kick with the ball of the foot. This is what the kick should look like (btw, it is not a 'snap' kick):

Kicking techniques do not tend to be taught too well in the JDJ tradition. For those in the JDJ tradition demonstrating for students or  publishing instruction manuals and/or videos, remember, students will study those images ad nauseum in an attempt to replicate them. If the images are of poor technique, they will work hard to produce poor technique.

Body Movements (Taisabaki)

'Defender's choice of attack, using any block'

The issue of 'any block' was discussed in the previous two posts.

Unbalancing (Kuzushi)

Normal single wrist grip - Normal unbalancing

Same side single wrist grip - Same side unbalancing 

Reverse single wrist grip - Reverse unbalancing

Rear both wrists grip - Rear unbalancing

Front both wrists grip - same side unbalancing

The first four attacks and unbalancings are pure Yoseikan Budo (YB).

The fourth attack and unbalancing is an extension of the basic unbalancings from wrist grips. Why is an extension being added into this section in the first grading an adult will be attempting? Shouldn't the first grading at least just be examining basic techniques. Variations can be introduced in later gradings.

Unbalancing (Kuzushi) - Blocking (Uke)

This section of the grading was discussed in the previous post where the issue of JDJ's classification of blocking techniques as being unbalancing techniques was explored.

Note that the above demonstrated blocks, karate style blocks, are not included in the unbalancing use of blocks in this section of the grading.

It is also worth noting that the required brushing block against a downwards hit in no way, ever, unbalances an opponent. Ever! (see previous post)

Locking Techniques (Kansetsu Waza)

'Two attackers, defender's choice of attack'

This is the first grading for an adult, and they are being expected to defend using a specified kansetsu waza against two attackers. It is their first grading. The inappropriateness of this stress element in this and in all of the mon grades was discussed in a previous post. 

Reflex (Shinken Shobu no Kata)

Shinken shobu no kata is explained and discussed in this post. This grading and training method is another unique aspect of JDJ's teaching and should be appreciated and shared as such (Marketing 101: differentiate the product).

This is an adult's first grading; is there any need for this (or any other) stress element? Maybe it's to acclimatise the student to shinken shobu no kata gradings given that this is the principal form of grading from the kyu grades onwards. Fair enough, but does this mean they are given a lot of leeway in this grading due to the stress element (ditto for the above stress element) and the fact that it is their very first grading?

#1 Normal single grip on the sleeve (low) - Body set arm breaking.

In the above unbalancing section, normal single wrist grip is demonstrated with normal unbalancing. In this defence sequence, body set arm breaking is facilitated by 'same side unbalancing' from a normal single grip on the sleeve (low). Why? Why complicate things in the first grading? Surely it should be to apply the whole taisabaki, kuzushi, waza phases of a technique that the grading seems to be based upon to bring the phases together in a defence?! A systems thinking approach.

#3 High punch - Atemi - body set arm breaking.

The use of atemi to unbalance an opponent, in the kuzushi phase of a defence, has not been introduced to the student in the grading as yet. Why include this new element in this stress section of the grading when other unbalancing methods have been demonstrated in the grading?

#5 Front snap kick - Brushing block - punch.

I would teach a grading candidate to use an 'empty block', no block at all, when executing this defence as a 'teach-the-teacher' exercise (see above re brushing blocks). Would the JDJ ryuha instructors mark the grading candidate down if they did not use a brushing block but simply an evasive body-movement and a decisive punch?

Comment

It may seem like I'm being overly critical of JDJ's efforts, however, it's more about learning from his efforts. First, how would you go about developing a grading system when you have no real experience with a grading system? How you go about introducing a systems based element into a 'collection of defences' grading system when you have no real understanding of systems based thinking? JDJ did a remarkable job given the circumstances, however, it behoves those that follow him to study what he did in order to improve on what he did; to see further by standing on the shoulders of a giant. It behoves them to gain insights and understanding rather than simply to imitate.

The Development of the JDJ Jujutsu Grading System Part 3.5: The Mon System and JDJ's Blocking Techniques Classification

This post follows on from the previous post concerning blocking techniques in the Jan de Jong (JDJ) jujutsu mon grading system. Specifically, this post looks at JDJ's classification of blocking techniques that he introduced into the mon grades.

Classification

You will recall from a previous post that the core of all learning is the identification of similarities and differences. One of the proven highly effective means of identifying similarities and differences is classification. Many in the martial arts think of classification as simply being an administrative exercise. They could not be more wrong, as I explain in my book on the science behind all fighting techniques:

Lackoff (1987) warns against such a dismissive attitude. He suggests that there is nothing more basic to our thought, perception, action, and speech than classification and that without the ability to classify we would not function at all, either in the physical world or in our social and intellectual lives.'

JDJ's Classification of Blocking Techniques

JDJ's classification of blocking techniques involves six categories: hard, soft, pushing, pulling, grabbing, and empty. Exploring those categories and the classification system itself is revealing.

Yoseikan Budo Kuzushi and JDJ's Classification of Blocking Techniques

You will recall from a previous post that JDJ included unbalancing (kuzushi) sections in his mon grades. These sections involved unbalancing techniques from hand grabs: e.g., normal single wrist grip - normal unbalancing. These attacks and techniques are taken straight from Yoseikan Budo (YB).

The JDJ classification of blocking techniques was introduced into the mon system to complement the unbalancing from hand grips, but for moving attacks. This is seen in their use in the various sections in the mon grades, however, it is explicitly seen in the Unbalancing (Kuzushi) - Blocking (Uke) sections in 5th mon and 9th kyu (both part of the mon system; see previous post).

You will recall from the previous post that one of Nakayama's blocking possibilities is unbalancing the opponent with a block. Do the blocks in JDJ's classification unbalance an opponent with the blocking technique?

JDJ's Classification of Blocking Techniques, Unbalancing, and Pencak Silat

JDJ did not originally develop his classification of blocking techniques to compliment the tehodoki kuzushi. He developed it to classify the response to an attack in the pencak silat he taught. This classification was then introduced into his pencak silat grading system. In this way, JDJ was conceptualising 'blocking techniques' as being uke waza.

Uke Waza

Uke waza is often translated in karate as being blocking techniques, however, it actually translates as receiving techniques; techniques used to receive an attack.

In this way, uke waza includes evasive body-movements (EBM), aka taisabaki, and so-called blocking techniques.

There are three ways of dealing with a moving attack in order to avoid injurious contact with the body: (1) 'block' the attack (see below), (2) move the attacking limb or object off the line of attack (deflection), or (3) move off the line of attack (EBM). There are three ways of repositioning oneself to execute a counterattack from a moving attack: (1) 'block' the attack, (2) move the attacking limb off the line of attack (deflection), or (3) move off the line of attack.

The last sentence was in response to a comment received on my Facebook post sharing the previous blog post. I share their conception of taisabaki in that it repositions tori to execute a technique, however, they are only half right. The avoiding injurious contact with the body from an attack aspect of taisabaki can never be forgotten or minimised.

Taisabaki is taught within the JDJ teachings in terms of an EBM to avoid injurious contact with the body. In doing so, it does not necessarily reposition tori in an optimum position to execute a decisive technique. When I began instructing my students that taisabaki is used to avoid injurious contact with the body and to reposition in order to attack, the positioning, distancing, and timing problems they experienced previously tended to sort themselves out. It also changed their mindset from being prey trying to avoid being eaten to being a counterattacker, a fighter.

PS: Uke means to receive. Ukemi is often translated as breakfalls, however, it actually means to receive through or with the body. In this case, ukemi is a biomechanically accurate description of breakfalling techniques. The force applied to the body when landing from a fall is based on Newton's third law of motion: for every action there is an equal and opposite reaction. Newton's 'action' and 'reaction' means mechanical force. In the case of ukemi, the falling body applies force to the landing surface upon impact, and the landing surface applies a reaction force to the falling/landing body, which ukemi is designed to absorb in a way that reduces the risk of injury (see my book on the science behind all fighting techniques).

Unbalancing (Kuzushi) - Blocking (Uke) 

You will recall from the previous post that an Unbalancing (Kuzushi) - Blocking (Uke) section was included in the 5th mon and 9th kyu gradings. Included in these sections were the demonstration of pushing, pulling, and grabbing block against a low punch and a brushing block against a downwards hit.

A pushing block involves an EBM (irimi) and a pushing force being applied to the opponent's attacking arm to unbalance the opponent (see first image above). A pulling block is the same except the EBM is either nagashi or irimi senkai and a pulling force is applied to the opponent's attacking arm for the same purpose (see image to the right). 

As explained in my book on the science behind all fighting techniques, mechanical force is defined as a push or a pull (see my post published in 2013 that explained the use of the mechanical concept of force to understand all techniques). Whenever an 'object' starts, stops, speeds up, slows down, or changes direction, a force caused that change in motion. As I explain in the aforementioned book, Jigoro Kano, founder of Kodokan Judo, was the quintessential martial arts biomechanist when he described kuzushi as being a push or a pull in his Kodokan Judo.

A grabbing block involves an EBM and 'grabbing' the opponent's attacking arm (see image to right). Unbalancing occurs when the EBM positions tori a small distance away for uke's attacking arm and the grabbing motion pulls said arm to tori's body thereby unbalancing uke. In force-related terms, this involves a pulling force being applied to uke's attacking arm at right angles.

I cannot remember any defence included in the JDJ jujutsu grading system that uses this type of 'block', not in its purest form at least. An example of its practical use might be in a grabbing-pulling motion when unbalancing uke in a circular motion which is a common tactic in YB and aikido, and JDJ's jujutsu and aikido. If so, why not demonstrate that in the grading rather than a technique that is never used?

 

Brushing block is as described. It brushes the opponent's attacking arm, like brushing dirt of their sleeve. It does not deflect the attacking arm. It doesn't have to because the EBM has taken care of the problem of avoiding injurious contact with the body (see previous post) The attacking arm stays on course without interruption. See below for an illustration of a brushing block (ignoring the strike to the throat).

There is no 'grabbing'. There is no pulling. There is no pushing. How does a brushing block unbalance an opponent? After all, it is included in the section of the grading in which the grading candidate demonstrates unbalancing an opponent using a block? When I asked two of the senior instructors this question, it was suggested that the unbalancing comes from the 'brush' slightly adding to uke's forward motion thereby slightly unbalancing them in that direction. Being polite, that is the very definition of a shoehorned answer/explanation.

If that was a shoehorned answer/explanation, then the answer to the same question in relation to empty blocks is a shoehorned answer/explanation par excellence.

PS: I challenge all students who are engaged in training with JDJ ryuha were these gradings are still employed to ask their instructor how a brushing block unbalances an opponent, which it is supposed to do given that it is included in a section of the grading that examines unbalancing techniques.

Empty Block

JDJ's empty block is no block at all. It is an EBM used to avoid injurious contact with the body. Empty block is part of JDJ's blocking techniques classification but is never mentioned in JDJ's jujutsu grading system. Why not?

JDJ's classification of blocking techniques was used in the JDJ jujutsu grading system to classify unbalancing techniques used against moving attacks. How does an empty block, no block at all and only an EBM, unbalance an opponent? When I asked this question of the senior instructors, it was suggested that by not being where the opponent expected, the opponent would topple forward having not met the expected resistance to the force applied by their attack. That may well happen, however, are you going to base your tactics in a physical confrontation on that assumption?

Hard and Soft Blocks

The hard-soft blocking techniques dichotomy is an oft discussed dichotomy in the martial arts and martials arts literature. It is usually discussed in terms of explaining the superiority of soft blocks over karate hard blocks. Often this argument is supported scientifically with the aid of the concept of forces, an argument that is flawed and shows the lack of understanding in terms of theory that many in the martial arts have.

Examples of the hard karate blocks are the basic high, middle, and low blocks of karate. The example given of soft blocks is deflections. It is suggested that more force is required to be applied with the hard karate blocks than with the soft deflections.

What the arguers do not understand is that these hard karate blocks are in fact deflections (for the most part; see below).

The argument is often that the hard karate blocks apply force against force whereas deflections do not, thus the latter being more efficient. The hard karate blocks do not apply force against force. The apply force at an angle to the attacking limb, thus deflecting the trajectory of the attacking limb. More force is applied to deflect the attacking limb in this case, therefore the only question is, why is more force applied in the case of hard blocks than soft blocks? Is the answer found in Nakayama's blocking possiblity #1 which is the block being used as an attack to discourage further attacks (see previous post)?

What is a 'block'?

Let's go back to the beginning ask the basic question: what is a block? The general definition is to make the movement or flow difficult or impossible. It's to put something in the way of something. 

The martial arts has a tendency of using terms without reference to their general meaning. There is no better example than that of throws and takedowns in the martial arts. A definitive distinction between these two classes of techniques is abscent in martial arts theory, and those proposed are either incomprehensible or plain wrong, until the one that I proposed in my book on the science behing all fighting techniques. My definition is supported by the general definition of throw and takedown, which the martial arts seem to have ignored.

The abovementioned argument in support of the superiority of soft deflections over hard karate blocks is that the latter apply force against force. The above presented a counter-argument, however, there are exceptions.

Are there true blocks in the martial arts, ones that apply force against force, ones that are put in front of an attack? A shin block is one. 

Gracie and Danaher distinguish between evasion and blocking in their Mastering Jujitsu (2003):

Evasive skills allow you to avoid strikes without contact. There are easy on your body and require proficient motion skills. Blocking allows you to safely absorb impact (rather than avoid it), and it requires sound conditioning and stance skills. (p. 77)

Their blocks include covering block, palm block, double-forearm block, and shin block. The shin block is referred to above as a true block. The double-forearm block (see right image) will be the only other Gracie and Danaher block considered here:

From your fighting stance, turn toward the incoming blow as you simultaneoulsy step away from it slightly. Bring your forearms together and tuck your chin, crunching your upper body inward, like a turtle retreating into a shell. (p. 78)

Aside from never having seen this block used or taught, other than in boxing where huge gloves provide the protection, why is the double-forearm block being used when the step away, the EBM, has taken the defender out of range of the attacker? Even if there is a valid answer, that question should always be asked when a block is used in conjunction with an EBM.

Returning to karate hard blocks. In addition to being deflections, they can also be true blocks depending on the direction of the attack and the body position of the defender. For instance, age uke (rising block, aka high block) is a deflection against a punch but is a true block against a downard hit with no EBM employed. A low block is a true block employed against a low roundhouse kick.

The Dog's Breakfast

You can see that the concept of blocking techniques as applied in the JDJ jujutsu mon grading system is a bit of a dog's breakfast, as it is in the martial arts in general (as I demonstrated in the chapter on blocking techniques in my book on the science behind all fighting techniques). But what to do about it? That is the question that is being raised throughout this examination of the development of the JDJ jujutsu grading system. What would you do?