It has been standardly assumed since Saito (1992) and Tada (1993) that scrambling in Japanese can be A-scrambling when it takes place within a clause, whereas it must be A'-scrambling when it crosses a CP boundary. This paper, however, shows that this traditional assumption is not sufficient to capture the A-/A'-distinction in scrambling in Japanese. More specifically, this paper provides new data of scrambling that involves Left Branch Extraction (LBE) out of a noun phrase and movement of a conjunct out of a coordinate structure and shows that they are necessarily A'-scrambling even if they take place within a clause. We establish a new generalization that not only scrambling out of a clause but also scrambling out of a noun phrase is necessarily A'-scrambling. This paper then proposes to deduce the generalization from the notion of phase and transfer domain: more specifically, it proposes that the A-/A'-distinction in scrambling correlates with whether scrambling takes place within a transfer domain or not.