A concept meaning 'once‑in‑a‑lifetime encounter' — the idea of treasuring each meeting as something unique and unrepeatable (commonly used in tea ceremony contexts).
茶道では一期一会の精神を大切にする。
In the tea ceremony, the spirit of 'ichigo ichie' is valued.
面接を一期一会のつもりで臨んだら落ち着いて話せた。
I approached the interview as if it were a once-in-a-lifetime encounter, and I was able to speak calmly.
旅先で出会った人との会話は一期一会だと思っている。
I think conversations with people I meet while traveling are once-in-a-lifetime encounters.