Even for me (as native Japanese), it's very difficult question. But I also find this kind of interesting, so I will try to answer your question.
In regular conversation, we (at least I) don't mind if you translate " = nationalism".
Regarding of Wikipedia, considers the country (or the government) is the first in everything, but is the word for activities of concert, freedom, and departure...etc.
Wikipedia binds the page to the statism page, not the nationalism page.
It's my understanding that (statism) is part of nationalism.