noun
corporate warrior
A somewhat dramatic or ironic term for a fiercely dedicated, hard-working employee who sacrifices personal life for the company. Often used in discussions of Japanese work culture.
彼は典型的な企業戦士で、毎日深夜まで働いている。
He is a typical corporate warrior, working until late every night.
Compound of 企業 (enterprise, corporation) and 戦士 (warrior, soldier). The exact origin is uncertain, but it likely emerged in the late 20th century as a metaphor for the intense dedication expected of Japanese salarymen.