I think this is actually a Great Cormorant.
Perhaps it's the computer monitor I have, but the photos seem to show a white throat patch, extensive yellow gular skin and fairly pale, greyish bill - all features typical of great. Adult great would not show any pale feathers in mid-Jan except on the throat so the lack of white flank patch and neck doesn't rule that out.
I agree that the neck looks slightly slimmer than is usually the case on great, but I think the 'kink' in the neck is fairly typical. I think the bill looks slightly slimmer because of the angle of the bird.
Pelagic/red-faced should look all-black (including face/bill - the red on the face is very limited) and I think even longer, slimmer necked and longer-billed.
Looking for pictures on the net, I found the following in-flight Pelagic cormorant in the US:
http://www.mbnms-simon.org/other/photos/photo_download.php?photoID=713&search=birds&speciesSearchTerm=&keywordSearchTerm=&s=160&page=9&image=RES_072205_048.JPG
The picture shows a very long, straight neck, very slender bill and long tail.
Also a perched winter-plumaged bird in Japan, which shows no pale areas on the head (just a paler area on the bill):
http://www.orientalbirdimages.org/search.php?p=4&action=searchresult&Bird_ID=1083&Bird_Family_ID=&pagesize=1
