Ninjutsu is best described as the collection of skills utilized by the Ninja while Ninpo, often
           referred to as "the higher order of Ninjutsu, " implies a philosophy for living based on the
           principles of Nin 

           Nin translates into patience, but can also imply perseverance, or stealth. The Japanese character
           for Nin consists of two parts or radicals. The upper radical is called yaiba which refers to the
           cutting edge of a blade. The lower radical can be read either as kokoro or shin, both of which
           mean heart. 

           The character po, which implies natural law, is used rather than do (i.e.. judo, kendo, aikido,etc).
           Referring to our art as Ninpo rather than Ninjutsu stresses training which is concerned with the
           internal development of the individual's character along with the technical skills of martial training. It
           isn't enough just to know techniques, it is where your heart and spirit are as a person that is
           important. For this reason, Ninpo stresses philosophic and spiritual training in conjunction with the
           physical training. This refinement of one's spirit is known in Japanese as seishinteki kyoyo. 

           Ninpo is concerned with the defense of the whole self, and recognizes that defense against a
           life-threat is dealt with by the spirit as much as with physical technique.