1A trading company — a firm specializing in buying, selling, importing/exporting, or brokering goods; in Japan, well known in the forms of general trading companies (総合商社) and specialized trading companies (専門商社).
彼は大手商社に就職し、海外事業を担当している。
He got a job at a major trading company and is in charge of overseas operations.
総合商社は資源からインフラまで幅広い分野に投資している。
General trading companies invest in a wide range of fields, from resources to infrastructure.
商社を通じて海外の部品を仕入れている。
We procure overseas parts through a trading company.