This is the 4315th most frequent Japanese word.
初対面
"初対面" means "first meeting" or "first time meeting someone."
Here, "初対面の時" is used as a timing reference, indicating the specific occasion of the first meeting with someone.
これは彼と初対面の時に撮った写真です。
This is a photo taken when I met him for the first time.
In this sentence, "初対面で" is used to describe the condition under which an action (meeting someone politely) occurs.
初対面であっても礼儀正しく接するべきです。
Even when meeting someone for the first time, one should be polite.
The word "初対面" is used as a noun meaning 'first time meeting someone' to describe the context of encountering a person for the first time.