講師

1. Origins, structure, and basic meaning

• Structure: 講師(こうし) refers to a person who teaches a lecture, class, or course.
• Basic usage: It is used for the instructor of a lecture, course, or training program. Typical patterns are 講師が説明する and 講師に質問する.

2. Common pitfalls and similar expressions

• Understand it as a role
  • Its central meaning is the person in charge of a particular lecture or course; the word alone does not specify employment status.
• Difference from 教師
  • 教師(きょうし) broadly refers to a teacher who continually teaches students, often at a school, while 講師 focuses on the role of delivering a lecture or course.