also: かおしゃしん
noun
face photo; portrait photo; mug shot
A photograph that shows a person's face, used for IDs, profiles, or informal snapshots. Can also refer to a police mug shot in context.
履歴書に顔写真を貼ってください。
Please attach a face photo to your resume.
パスポート用の顔写真を撮った。
I took a face photo for my passport.
証明写真 specifically refers to an ID photo or official identification photograph, while 顔写真 is a more general term for any photo focusing on the face.
Compound of 顔 (face) and 写真 (photograph).