noun
public corporation; foundation
Refers to a specific type of public corporation established under Japanese law, notably the Teito Rapid Transit Authority (帝都高速度交通営団). The term is now largely historical, as most such entities have been reorganized.
営団地下鉄は現在の東京メトロの前身です。
The Eidan subway was the predecessor of today's Tokyo Metro.
Compound of 営 (manage, operate) and 団 (group, organization). The term was coined for a specific legal entity type during the wartime period.