noun
militarist
Refers to a person who advocates or supports militarism, or a military expert. Loanword from English.
彼は熱心なミリタリストで、軍備拡張を主張している。
He is an ardent militarist and advocates military expansion.
More formal and explicitly refers to an advocate of militarism as an ideology, while ミリタリスト can also imply a military enthusiast or expert.
Loanword from English 'militarist'.