Just to clarify here, zanshin is "lingering mind", or "remaining mind", and refers to after the action, so it's not really what you're describing here... it's more an aspect of mushin ("no mind", a relatively literal and incomplete definition...).
As you said in another thread, words are not exact and translation of words just compounds that situation. Zanchin in some arts is after the event, in others, like Aikido it is awareness of the possibility of another attack after the throw which then really means before the next potential threat, and in Karate it is awareness at all times, including before an attack.
I would argue that mushin is more the situation during a conflict where there is no ego or emotion, no preconceived defences or attacks, just a mind that is ready to deal with whatever happens.
So in the context of the question and my response, mushin is not what I would call the ability to read your opponent. In fact it would almost be the opposite where you don't think about anything that is happening. You are just prepared for anything that will come.
Zanchin is closer to what I would call the "training' that
Mr. President is referring to in his question, keeping in mind it is only part of my answer which was irimi. In its simplest interpretation irimi is entering but in reality it is way more than that. It includes recognising the situation, blending with your opponent's mind and blending with his physical action as you enter his space.
The question then becomes, is reaching that level of proficiency training, or is it the result of training?
:asian: