noun
mercantilist
Refers to a person who advocates or practices mercantilism, an economic theory emphasizing government regulation of trade to increase national wealth.
彼は重商主義者として、輸出を増やす政策を支持した。
As a mercantilist, he supported policies to increase exports.
重商主義 is the economic theory of mercantilism, while 重商主義者 refers to a person who follows or advocates that theory.
Compound of 重商 (mercantile) + 主義 (doctrine) + 者 (person). The term is a direct translation of the Western concept of mercantilism.