Yup, and if you eat kaiseki off styrofoam with Coca-Cola sitting on your couch watching Jerry Springer, it is still Japanese food. And the point of it will be less and less accessible to you the more random unrelated elements you add.
... and that may or may not be applicable to aikido.
It's an analogy, and I don't think that it's unrelated at all. The substance of Aikido as described by Morihei Ueshiba (and he discusses it in great detail in "Take Musu Aiki") has nothing to do with being specific physical cultural activities, just as the substance of Japanese food has nothing do do with what you use to scoop it into your mouth.