school uniform for boys; gakuran
Colloquial abbreviation of 学生ランダ. Typically a black jacket with a stand-up collar and matching trousers, worn by male middle and high school students.
He wears his gakuran to school every day.
I fasten the buttons of my gakuran.
Abbreviation of 学生ランダ (gakusei randa), where ランダ refers to a stand-up collar style. The exact origin of ランダ is uncertain, but it is associated with the Dutch word 'rand' or a brand name.