noun
mercantile spirit; commercialism; profit-driven mindset
Often carries a negative nuance of being overly focused on profit, sometimes at the expense of ethics or quality.
あの会社の対応には商人根性が見え隠れする。
You can see a mercenary spirit lurking in that company's response.
商人根性をむき出しにして値上げを要求した。
He blatantly showed his profit-driven mindset and demanded a price increase.