I skied the Pescado (and a little on the Sakana) throughout my Japan trip, wouldn't have had it any other way, that thing ripped the one groomer/non snow day we had there even. All of you recommending an all mtn ski are silly, sure if it doesn't snow it's a safe option but if it does (which the chances that it will are very high) you're just going to hate yourself. Plus, there's plenty of powder specific skis these days that have the ability to be versatile if it doesn't snow.
As far as touring goes, on my trip we had the option to skin but only did for one short lap just to access an open steeper alpine line. We quickly returned to the sidecountry trees just to get more skiing in seeing as there's plenty of short steep pitches with huge pillows and avy barriers.