adverb
Used when something happens or is done for the first time. Often appears in formal or written contexts, but also in everyday speech.
初にこの地を訪れたのは十年前です。
It was ten years ago that I first visited this place.
初に会ったときから、彼には親しみを感じた。
From the first time I met him, I felt a sense of familiarity.