Perhaps I wasn't clear enough, apologies if this is the case: of course they will know. As I said in my second post, this is not confirmed yet and I am trying to get this info from other sources (for several reasons, main one being that if I am given a 1 week notice, believe it or not but the logistics for such a move will be different than if I'm given a 2 to 3 months notice).
I am not trying to start any process without my company assisting it. Just trying to get information, since if I understand correctly the Japanese regulations, my estimate schedule will drastically change depending on the fact I have to apply for the COE or not.