1.
lesson, chapter
A numbered section in a textbook or course.
この課は難しい。
This lesson is difficult.
第5課を勉強しましょう。
Let's study Lesson 5.
教科書の第10課まで終わったので、来週から新しい本を使う。
We finished up to Lesson 10 in the textbook, so we'll use a new book starting next week.
2.
section, department
A division within an organization.
営業課で働いている。
I work in the sales department.
人事課に連絡してください。
Please contact the personnel department.
来月から総務課に異動することになった。
I'll be transferred to the general affairs department starting next month.
課 is a suffix with two main uses: numbered lessons in educational materials and divisions within organizations.
FOR LESSONS:
- 第1課: Lesson 1
- 教科書の課: textbook chapter
- Often used with 第~ prefix for numbering
FOR DEPARTMENTS:
- 営業課: sales section
- 人事課: personnel department
- 総務課: general affairs section
ORGANIZATIONAL HIERARCHY:
課 is smaller than 部 (department/division). Common structure: 会社 → 部 → 課
RELATED:
- 課長: section chief
- 課題: assignment, task