According to the artist, she's wearing the Yuugumo-class' clothing, not Yuugumo's specifically. So can't really say the Yuugumo cosplay tag is all that appropriate.
I myself think putting it as yuugumo_(kantai_collection)_(cosplay) works well enough. Because she's the firstship/nameship, equals to being the representative for the whole class/its clothes/its specialties, etc. Although that is indeed stretching it a bit too much.