noun
ultranationalist
Refers to a person who advocates extreme nationalism, often prioritizing their nation above all else.
彼は超国家主義者として知られている。
He is known as an ultranationalist.
国家主義者 is a nationalist in general, while 超国家主義者 implies an extreme or radical form of nationalism.
Compound of 超 (chō, 'ultra-') + 国家主義 (kokkashugi, 'nationalism') + 者 (sha, 'person').