Natori teaches that throwing effectiveness depends on leverage and timing, not on the thrower's mass or strength. A smaller warrior can throw a much larger opponent if the mechanics are correct. The fundamental principle: use the opponent's own weight and momentum against him, redirecting his mass in directions his balance cannot support. This is not a contest of strength. It is a problem of physics.1
The doctrine has profound implications. In combat where a large warrior faces a smaller one, conventional strength-based fighting favors the larger opponent. But throwing inverts the advantage. A smaller warrior's lower center of gravity and lighter mass actually become advantages if he can position the larger opponent's center of gravity over empty space. The larger opponent's own weight then works against him.
Natori emphasizes this repeatedly: the throw is not about how hard you pull. It is about where you pull from and when. Two warriors applying identical force at different moments will see completely different outcomes. One will succeed; one will fail. This is why throwing requires training in timing and positioning, not just strength.
Hip and center-of-gravity throws. The most powerful throw comes from repositioning the opponent's center of gravity directly above your hips, then rotating your entire body. This transfers your body's weight, the opponent's weight, and the momentum of the rotation all in the same direction — directly opposite to where the opponent's balance can support.
The mechanics: as the opponent moves toward you, you pivot your hips and pull him forward and downward. If his center of gravity passes above your hips at the precise moment you rotate, his own weight becomes the force that throws him. You are not pulling him hard. You are rotating at exactly the right moment so he loses balance and falls through.
Natori teaches that this throw is most effective when the opponent is already moving toward you. His momentum is already committed. You redirect it rather than create it. An opponent walking forward into a hip throw can be thrown with minimal force because you are borrowing his own momentum.
Arm and shoulder-structure throws. Throwing from arm control depends on understanding the shoulder joint's geometry. The shoulder cannot easily absorb force when the arm is trapped behind the body or twisted into specific positions. When the arm is pinned, the shoulder joint itself becomes the pivot point.
Natori teaches several specific arm-control throw variations: controlling the opponent's wrist and elbow simultaneously, then rotating so the shoulder joint cannot follow. The opponent's arm becomes a lever against his own body. His shoulder joint reaches its maximum extension. If he does not fall, his shoulder dislocates.
The counterintuitive principle: you are not pulling hard on the opponent's arm. You are creating a geometry where his own shoulder structure forces him to fall or injure himself. Again, the opponent's own anatomy works against him.
Leg and footwork timing. The throw is not complete until the opponent's feet leave the ground. A masterful throw that leaves the opponent with one foot still planted is incomplete. He can still drive power through that foot. He can still resist.
Natori teaches specific footwork patterns that ensure the throw executes cleanly. As you pivot and rotate, your feet move in ways that extend the opponent's balance further and further. By the time he realizes he is falling, both feet are already off the ground. At that point, the throw is terminal — nothing stops it.
Timing and momentum. Natori repeatedly emphasizes that the throw must catch the opponent in moments of commitment. The worst moment to throw someone is when he is perfectly balanced and stationary. The best moment is when he is already moving in a direction that you can hijack and redirect.
For example: if an opponent is walking toward you, that forward momentum is already committed. A throw that redirects that momentum feels effortless. But if that same opponent is standing still and braced, throwing him requires you to overcome his entire weight. The throw that works when he is moving feels impossible when he is static.
This principle transforms training: a significant part of throw training is learning to recognize moments when an opponent is off-balance or committed, and using those moments. A warrior who must wait for perfect opportunity never gets to throw. A warrior who has trained thousands of throws develops an intuitive sense for the one-second window when the throw will work.
In Natori's military context, throwing is not a submission technique or a sport move. It is a method to remove an opponent from tactical positioning and prevent him from continuing to fight.
Displacement from position. During a siege or battle, throwing is valuable specifically for removing an opponent from strategic locations — a warrior defending a narrow bridge can be thrown off the bridge entirely. A warrior on elevated ground can be thrown downward. A warrior blocking a doorway or passage can be thrown sideways, breaking the formation.
Natori teaches that the value of the throw is not in the impact of the fall (though that matters), but in the moment of vulnerability after the throw. A warrior who has been thrown must recover before he can fight again. That recovery moment — 1-3 seconds where he is on the ground and cannot defend — is when allies can attack, move past him, or secure a position.
Crowded-condition throws. Throwing is most tactically valuable in crowded conditions where the opponent cannot freely fall. In an open field, throwing an opponent into soft grass is a waste of effort. But throwing an opponent backward into allies waiting to restrain him, or downward off a wall, or into terrain features that cause injury — that changes the fight.
Natori notes that throwing is especially valuable in situations like fort defense, bridge holding, or narrow passages where the physical environment constrains safe falling. An opponent thrown in these conditions cannot choose where he lands. He cannot control the fall safely.
Psychological impact. Natori emphasizes that being thrown has profound psychological effects. A warrior who is struck might remain confident — he is still standing, still fighting. But a warrior who has been thrown, who has lost his feet and crashed to the ground, often breaks confidence and hesitation.
When throws start occurring in a unit, momentum shifts. Soldiers see their allies being thrown and confidence erodes. The throwing warrior's allies see the throws working and confidence grows. Eventually, the psychological cascade causes units to break formation.
Natori teaches that throwing requires thousands of repetitions to ingrain properly. The mechanics must become automatic because the moment of opportunity is brief and unstable. A warrior who must think about leverage loses the opportunity. A warrior who has practiced leverage hundreds of times recognizes the correct moment and executes instantly.
Training progression: basic hip throws against compliant partners, then against resistant partners, then throws off-balance and in motion. Only after hundreds of successful throws can a warrior expect to throw effectively in actual combat when stressed and threatened.
Natori emphasizes that partial training is worse than no training. A warrior who has practiced throwing 50 times is more likely to attempt a throw he cannot complete than a warrior who has never trained throwing. Incomplete throws alert the opponent and waste the surprise advantage.