noun
commercial school
Historical term for a pre-WWII secondary school focused on business and commerce; replaced by 商業高等学校 in the modern system.
祖父は戦前に商業学校を卒業した。
My grandfather graduated from a commercial school before the war.
Modern equivalent; 商業学校 is the older, pre-war term.
Compound of 商業 (commerce) and 学校 (school). The term is now historical.