The act of introducing oneself—giving one's name, job, brief background, etc.; also a short speech or text used for that purpose.
会議の最初に全員が自己紹介をしました。
At the start of the meeting everyone introduced themselves.
初めての授業なので、簡単な自己紹介をしてください。
Since it's the first class, please give a short self-introduction.
履歴書に自己紹介文を一段入れておくと印象が良くなることがあります。
Including a brief self-introduction in your resume can sometimes make a good impression.
仲間作りのために自己紹介カードを配った。
We handed out self-introduction cards to help people get to know each other.