Famed secret agent Mr. X is a man who lives with danger every day, a man who laughs in the face of death; yet he is never seen to carry a weapon. How, then, does he manage to overcome his many foes? The answer is simple: Mr. X is a master of Ketsugo, the greatest method of hand-to-hand combat ever devised by the human mind. He has no need for guns or trick gadgets. As a Ketsugo Black Belt of the Ultimate Degree, Mr. X is a walking arsenal of deadly efficiency.

Based on the ancient secret wisdom of the Orient, Ketsugo combines athletic skill and mental discipline with the scientific principles of physics and anatomy. In these pages, Mr. X will reveal to you the most effective techniques of delivering mild, serious and fatal blows to any opponent.
Proper concentration is essential to Ketsugo. Mr. X uses regular meditation to keep his mind razor-sharp and ready for the rigorous demands of this fighting technique.

Your mind must be completely free of distraction, completely focused on the attacker. Then you are ready to find the enemy's crucial weakness and exploit it to your advantage. This ensures maximum effectiveness of the twists, locks, chops, kicks and devastating throws of Ketsugo, and above all it is the key to ketsu-waza, the incredible paralyzing nerve pinch.

Not only the hands, feet and fingers, but any part of the body becomes a fearsome weapon when practicing Ketsugo. Here Mr. X breaks a brick in two with his head, as easily as if it were a Fabergé egg.
How can Mr. X perform such an amazing feat? It is quite simple. First, he banishes all fear from his mind. Then, he studies the brick to find its flaws. Last, Mr. X strikes the weak part of the brick quickly and precisely on his forehead above the brow. As is written in the I Ching, "Inferior man fear brick is Mountain, the Unmoving. Superior man know brick is Earth, the Yielding. Success and good fortune."
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