Ninpo-taijutsu, is more commonly known as ninjutsu, and both are relatively modern terms to explain ancient martial traditions and schools which were based in or around a lose counter culture to the more historically well known samurai, the traditional ruling class of Japan. The fact that the ninjutsu practitioners were usually based in smaller and more remote communities is one of the major reasons that their collective martial disciplines have been saved from fundamental change; what we have and what is taught is a system of martial arts that specialises in the total practicality of confrontation, aggression and combat. There is no sporting concept within the study of ninjutsu.
Ninjutsu is a very well reasoned set of congruent thoughts and actions specifically tailored and targeted at pitting your natural and learned advantages and strengths against the studied weaknesses of your enemy. This is strategy, this is the art of the advantage.
A sound fighting strategy is coherent and congruent action backed up by strong technique, an effective mixture of thought and action with a basic underlying structure of movement distance and timing. Within the associated arts of fighting the most basic strategy, whether it be an army against another army or one warrior against another warrior, is the application of strength against weakness. This is the first, natural and often overlooked advantage of a sound fighting strategy. Pre conceived ideas of strength and weakness are sometimes unsound. You will learn to observe, and there you will see what those who are not trained do not see, or have ignored or discarded through rashness, stupidity or ignorance. If you fail to identify and analyse the obstacles, dangers and the strengths of your enemy, then you don't have a strategy, you only have hope.
Those skilled at ninjutsu make sure that their momentum is closely channelled and their timing is closely controlled. Momentum is like drawing a catapult, timing and control are like pulling the trigger. There is no use in being an expert in striking if your grappling is poor, as there is no use in being an expert in grappling if your striking is poor. There is no use in being an expert in both striking and grabbing if your locks and ground work are poor. This is why you train so hard; it is to keep all your links strong. This is ninjutsu.