A private railroad is a railroad run by a private business entity (usually a corporation but not need be), as opposed to a railroad run by a public sector.
In Japan, private sector railway (私鉄 or 民鉄 Shitetsu or Mintetsu?), commonly simply private railway, refers to a public transit railway owned and operated by private sector, almost always organized as a corporation (Kabushiki kaisha), but may be any type of private business entity. Although Japan Railways Group companies are also corporations, they are not classified as private railways because of their unique status as the primary successors of the Japanese National Railways (JNR). Voluntary sector railways (semi-public) are additionally not classified as shitetsu due to their origins as rural, money-losing JNR lines that have since been transferred to local possession, in spite of their organizational structures being corporatized.
Among private railways in Japan, 16 companies are categorized as "major", these same companies also utilize quadruple track and skip-stop services like varying hierarchies of express trains. They are often profitable and tend to be less expensive per passenger-kilometer than JR trains that also run less dense regional routes, and assumed a heavy burden of the former JNR debt. Private railways corporations in Japan also run and generate profits from a variety of other businesses that depend on the traffic generated through their transit systems: hotels, department stores, supermarkets, resorts, and real estate development and leasing.