Originally Posted by
margo 
No need to add to your anxiety - all you have to say is that it's doctor's orders and if they push for more info just say it's personal and you'd rather not discuss it. Simple and to the point (and true!).
You've got to understand Japan a bit more. Unless I have some serious liver issues, there will always be a customer/boss who will say "Aww...come on. One drink won't kill you." And after refusing so many drinks, it starts to becoming insulting to them. It's just part of their culture...can't say I agree with it, but that's what I'm up against.