i stand rightly corrected. question for you or those who know, does the usage of religious teminologies/names have some implication on philosophy as well as technical in martial techniques/principles?
As a kind of shamanistic possession.
You could find "Marishiten: Buddhist Influences on Combative Behavior" by David A. Hall* (in Koryu Bujutsu: Classical Warrior Traditions of Japan
) worth reading.
*His dissertation about this subject is more ellaborated, but longer and heavier. With all due respect, appropriate for a more scholarly place than a internet forum, IMHO.