Koi no yokan
Etymology
Japanese 恋の予感, from "koi" (romantic love), "no" (of), and "yokan" (premonition, foreboding). It is carefully distinguished in Japanese from "hitomebore," love at first sight; koi no yokan is the sense of inevitability, not the fact.
noun phrase · /KOY noh yoh-KAHN/
The premonition, on first meeting someone, that the two of you are destined to fall in love.
What it names
It captures a feeling more subtle than love at first sight — not love yet, but the quiet certainty that it is coming.
Example
There was no fireworks moment, just a calm koi no yokan that they would matter to each other.
Related idea
Where forelsket is the feeling once falling has already begun, koi no yokan comes earlier — the forecast of love rather than its first weather.