blazer
A jacket similar to a suit jacket but less formal, often worn as part of a school uniform or casual business attire.
彼は紺のブレザーを着て面接に行った。
He wore a navy blazer to the interview.
この学校の制服はグレーのブレザーです。
This school's uniform is a gray blazer.
She wore a navy blazer to school.
He took off his blazer when he entered the classroom.
This high school's uniform is a blazer.