1.
traditional boys' school uniform with stand-up collar
A black, military-style uniform with a stand-up collar (Prussian collar) and brass buttons, traditionally worn by male students in Japanese middle and high schools. Still used at many schools today.
学ラン comes from 学 (学生, student) + ラン (from the Dutch word "rand" or the Japanese abbreviation of オランダ, referring to Western-style clothing).
The 学ラン is characterized by:
The female counterpart is the セーラー服 (sailor uniform). Both are iconic symbols of Japanese school life, though many schools have switched to ブレザー (blazer) style uniforms.