What if a man were to rush up and push me? If instead of pushing back, I were to take hold of his arms or his collar with both hands, place the ball of one foot against his lower abdomen, straighten my leg and sit back, I could make him somersault over my head. Or suppose that my opponent leans forward a bit and pushes me with one hand, this puts him off balance. If I grab him by the upper sleeve of his outstretched arm, pivot so that my back is close to his chest, clamp my free hand on his shoulder and suddenly bend over, he will go flying over my head and land flat on his back.
As these examples show, for the purpose of throwing an opponent the principle of leverage is sometimes more important than giving way. Jujutsu also includes other forms of direct attack, such as hitting, kicking and choking. In this respect, the "art of giving way" does not convey the true meaning. If we accept jujutsu as the art or practice of making the most efficient use of mental and physical energy, then we can think of judo as the way, the principle, of doing this, and we arrive at a true definition.
In 1882 I founded the Kodokan to teach judo to others. Within a few years, the number of students rapidly increased. They came from all over Japan , many having left jujutsu masters to train with me. Eventually judo displaced jujutsu in Japan and gradually other parts of the world."