I'm guessing she meant "Shinto" but I don't know that he was a priest. I believe there's a category of shrine membership for non-priests who have undergone some formal training. My guess is that he fit into that category, but I could be wrong.
I know he was called a "mystic", and he's been known to have trained clergymen. And he wore a white hakama,(all shrine workers did) I don't know if anything ever comes out and says he is a priest I'm also having trouble finding any text that comes out and says the leaders of the Shinto were priests. But if it walks like a duck and talks like a duck....