重じゅう要よう産さん業ぎょう

noun

key industry; important industry

Refers to an industry that is vital to a country's economy or security, such as energy, defense, or food production.

• エネルギーは国くにの重じゅう要よう産さん業ぎょうの一ひとつです。

  Energy is one of the country's key industries.