also: こじんじぎょうしゅ
noun
sole proprietor; sole proprietorship; one-man business
Refers to an individual who owns and operates a business alone, without incorporating. Common in legal, tax, and business contexts.
彼は会社を辞めて個人事業主になった。
He quit his company and became a sole proprietor.
個人事業主として確定申告をする。
I file a tax return as a sole proprietor.