Having failed with the Sparrowhawk, I was going to stay out of the rest of the thread about the cormorants. But I hope my comments on the cormorants and my photos will help the OP and others who may be reading.
I don't think that there are any Temminck's (Japanese) Cormorants in any of the photos, and even if there were, you can't see enough to call the ID. Great is overwhelmingly the common cormorant in Japan, even on the coast.
I have been birding in Japan for ten years or so (and had never birded elsewhere previously). Just last week by chance, I started to combine all my bird photos into one catalogue. Otherwise they are in annual catalogues (originally I never expected to get even moderately serious about birding), mixed in with scenic and family photos and whatnot. One purpose of making a Japanese birds catalogue is to try to weed out ID errors I've made, and I've found quite a few already.
Anyway, when I looked at my ten-year catalogue, I was surprised to find only about sixty photos ID'd as Temminck's. And when I looked at them, some were probably Greats and others were uncertain. But when I looked at the locations, I realised why. I live quite a way from the sea. But even at the coast, the cormorants are Great, unless you are at a remote and rocky location (I'm not saying they never stray; just that you would need very good evidence in another location). Another reason is that I have only a 300mm lens - I like to walk around rather than stand by a tripod. And Temminck's are rarely close enough to get a good shot with a 300mm lens.
The Japanese word for Great Cormorant is Kawau - U is cormorant, and Kawa is river, so River Cormorant. (Fun fact for use in birding club pub quizzes: the Maori word for Great Cormorant is Kawau, with some completely different etymology.)
The Japanese for Temminck's Cormorant is Umiu - Umi is sea, so Sea Cormorant. But sea doesn't seem to mean on the coast, it really means on the sea or out to sea.
I am attaching some of my photos to illustrate some points. There are more than five photos, so the photos and my comments will spill over to the next post (i.e. my reply to this post).
As far as I can see from books and observation, the key feature differentiating the two birds visually is the shape of the yellow face patch. If seen clearly, this comes to a point behind the bill line in Temminck's descending in a concave path after the point (relative to the bill). In Great, a clear point is often not obvious, and the yellow makes a convex shape below the bill. Another way of saying this would be: if the bill is horizontal, then there is never yellow below the bill which is behind the point at the rear of the bill in Temminck's, but there usually or always is in Great.
However, seasonal (and age) differences are large, and then there's the fact that when you see them, their feathering is affected by water, mud, and other stuff.
I also looked at illlustrations and photos in books I have, and another point I would like to make is that the photos and illustrations tend to illustrate the best case; but many birds in the field are not so obviously species A rather than species B.
Photos 1 (Temminck's) and 2 (Great) are juvenile birds, but illustrate the difference of facial yellow well.
Photos 3 and 4 are breeding Temminck's from two different places. Notice how little yellow there is, as well as its shape. Great has a more yellow than this even in breeding plumage (though see photos in next post).
Photo 5 shows some breeding Temminck's. Again, notice the pointing of the yellow, and how little there is. And on the right-hand bird, maybe you can see the green sheen to the coverts that is supposed to be a distinctive feature of Temminck's as opposed to Great (though I wouldn't recommend relying on it).