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As
a grappling art, Judo's techniques emphasize the use of the hands, arms,
body, legs, and feet. Adapted from Jujitsu, the techniques are similar,
requiring use of timing and leverage to unbalance opponents and execute
throws.
The
aim, however, is to attain power over their opponent without resorting
to brute force. The movements generally end with pins or arm locks; chokes,
strangleholds, and breaking techniques are seldom if ever used since founder
Jigoro Kano wanted to create a less hazardous system.
The
ways in which force and energy are applied and expressed are extremely
important in Judo. As "the gentle way," Judo uses the least
possible amount of force against an opponent's strength. Movements must
be performed continually and in accordance to, instead of opposing, the
opposite force. The idea is to attain harmony with one's surroundings.
Many of the movements move around the body's center of gravity, or the
so-called hara located below the belly button, so that the student will
remain balanced and harmonized with the forces around him.
Since
Judo has gained popularity as a sport, students perform these techniques
mainly to score points, and the more combative or self-defense techniques
are not as emphasized until Black Belt level and even then those are limited
in scope and quantity.
The
three main categories of techniques are: nage-waza (throwing techniques),
katame-waza (grappling techniques), and atemi-waza (striking techniques).
Additionally, students learn basic skills, such as proper falling and
stances to avoid injury.
Stances
Natural stance
The entire body is straight and relaxed, with the legs slightly apart.
Toes are pointed forward and weight is evenly distributed between both
legs. Hands are placed flat against the thighs. The natural stance is
non-combatant and used to express one's respect and discipline. It is
held to focus attention on a single thing (e.g. the instructor during
a lesson or an opponent before a match). It is often assumed before bowing
as well.
The
right natural stance is assumed with the right foot forward, and the left
natural stance with the left
foot forward.

Natural Stance
Defensive
stance
Positioned in the natural stance, the body is facing straight ahead. The
feet are slightly farther apart and knees are slightly bent to lower your
body. Weight should be evenly distributed on both feet. The right defensive
position is assumed with the right foot forward, and the left defensive
position is assumed with the left foot forward.

Right Defensive Stance
Breakfalls
Breakfalls are literally the breaking of falls, or the practice of falling
(ukemi) without injuring oneself. Breakfalls are extremely important in
Judo, and must be learned before practicing throws. The four basic breakfalls
are: the front, back, side, and rolling breakfall.
Front
Breakfall
This move can be started from crouching position or standing position.
The body should dives forward onto the palms of the hands, resting on
the elbows. The knees stay together to prevent any kicks from the rear
from injuring the groin and the head is turned to protect the nose. The
hands are turned inward.
 
Front Breakfall
Back Breakfall
The backwards breakfall is most commonly practiced in the crouching position.
The feet are kept slightly apart, the chin is slightly tucked in, and
the body resting on the heels. The weight is spread evenly between both
feet. The arms can be extended straight in front, or crossed over the
chest. Rolling backward along the curve of the spine, the hands are slapped
down on the mat (the harder the slap, the easier the landing). The arms
should be at a right angle from the body. After the backwards breakfall
is mastered, it can be practiced from a standing position.
 
Back Breakfall
Side Breakfall
It is safest to practice the side breakfall from crouching position first.
Squatting on the heels, the feet are kept slightly apart, and the body
weight rests evenly on them. The arms are rested in front, on each knee.
In one motion, the right hand is brought to the opposite shoulder, and
the right foot is extended. Falling to the right, the right palm is slapped
down. The head is kept up with the left hand. The left side breakfall
is practiced in the reverse direction, with the left hand. After the side
breakfall is mastered, it can be practiced from a standing position.
 
Side Breakfall
Rolling
Breakfall
The forward rolling breakfall is more challenging than the previous two,
since it involves rolling the entire body. The body is upright at starting
position, with the right foot is placed in front. The right knee is bent,
and the upper body is bent forward so that the hands are placed in front
(between the legs) on the ground, pointing inward. The right elbow is
bent, bringing the back of the head and right shoulder onto the mat. Using
the left foot to push the body forward, the body is rolled over in a circle.
The right elbow, upper arm, shoulder, and bottom, and left leg and foot
will all hit the ground simultaneously, landing the body in side breakfall
position. The left palm is slapped down onto the mat. The left forward
breakfall is practiced in the reverse direction, with the left hand.
 
Rolling Breakfall
Throwing
(Nage-waza) 
Throwing
is a matter of leverage and balance, instead of pure strength. They are
typically performed in a small amount of space. Throws are most efficient
when the opponent is gripped tightly, so that he does not fall away. The
person who is throwing is called the Tori, and the one thrown is called
the Uke. Throws performed while standing are called Tachi-waza, or "standing
techniques." The body part he uses determines what type of tachi-waza
he will use.
Hand
and arm techniques (Te-waza)
  
Ippon Seoinage
Hip
techniques (Koshi-waza)
  
Harai Goshi
Foot
and leg techniques (Ashi-waza)
  
Tai Otoshi
Rear
sacrifice techniques (Ma
sutemi-waza)

Tomoenage
(432 kb)
Side
sacrifice techniques (Yoko
sutemi-waza)

Yoko
Otoshi (562 kb)
Read
more
about Nage-waza
Grappling
(Katame-waza) 
Once an opponent is thrown down, he must be kept down so that he cannot
attack again. Grappling techniques are used for this purpose. They can
be used while standing or while both opponents have fallen down. There
are three types of Judo grappling techniques:
Osae-waza
(pinning holds)

Yoko Shiho Gatame
Shime-waza
(strangling/choking holds)
Gyaku Juji Jime
Kansetsu-waza
(joint locking holds)
Juji Gatame
Read
more
about Katame-waza
Striking:
Atemi-waza 
As
defined by the word Atemi (Ate: blow and Mi: body), strikes are blows
to the body. These techniques are extremely dangerous (even deadly), and
never practiced outside of kata.
The two types of Atemi-waza are:
Ude-ate
(arm strikes)

Ude-ate
(423 kb)
Ashi-ate
(leg strikes)

Ashi-ate
(427 kb)
Read
more
about Atemi-waza

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Images
of "Front Breakfall", "Back Breakfall", "Side
Breakfall", "Rolling Breakfall" from
Ultimate Jujitsu (http://www.ultimatejujitsu.com).
webmaster@ultimatejujitsu.com. Aug 2001. Email message.
Images
of "Ippon Seoinage", "Harai Goshi", "Tai Otoshi",
"Yoko Shiho Gatame", "Gyaku Juji Jime" and "Juji
Gatame" from
Judo Information Site: Judo Pictures and Techniques (http://www.judocentral.com).
support@judocentral.com. July 2001. Email message.
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