pokoko on 05 January 2016
If this list comes from Sony then it's probably only titles where Sony has some kind of deal in place that keeps them certifiably exclusive.
On the other hand, some of the other Japanese exclusives might only be exclusive by circumstance rather than by agreement. That is to say, the publishers could theoretically decide to release an Xbox One version in the west, if they wanted. They probably won't but they could, which is why Sony wouldn't put them on an iron-clad list.
