expression, i-adjective
it hasn't been long since
Used to indicate that only a short time has passed since an event or the start of a state. Often followed by ので, から, or ため.
See also: 日の浅い
入社してまだ日が浅いので、わからないことが多いです。
It hasn't been long since I joined the company, so there are many things I don't understand.
この
This project hasn't been going on for long, so we haven't seen results yet.