Budo is definately a Zen process.
My last post, exploring inherent weaknesses and bad habits in my own technique, was well commented on by Sensei Strange.
"Lowry Sensei told me in a phone conversation that Budo is a Zen art, because every time you take to the mat you regain the beginners mind. You always find a problem that takes you right back to a beginning."
It reflected a passage in Nitobe's book Bushido that I had recently read and had yet to put into context.
"A foremost teacher of swordsmanship, when he saw his pupil master the utmost of his art, told him, 'Beyond this my instruction must give way to Zen teaching....'"
And while the student will have to come to terms with this Truth in order to advance his skill, it is likely that his training in swordsmanship was a lesson in Zen all along.