科
This Chinese character means department.
You can watch how to write this. - (「科」の書き順（筆順）動画 - 漢字書き順辞典)
This Chinese character is usually combined with other Chinese characters, and read as "か".
For example, "科目 (かもく)" means subject.
"教科 (きょうか)" means curriculum, subject.
"教科書 (きょうかしょ)" means textbook.
Until high school, you usually have to study a variety of subjects.
In college, you will be able to immerse yourself in what interests you.
By Higashi-Mikawa Kyōjindō Shujin (東三河狂人堂主人)