It's been a long time.
＊
It has been + 期間
I haven't seen you + 期間
久しぶり
[ ひさしぶり / hisashiburi ]
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It's been a long time.
It's been a while.
I haven't seen you in a while.
I haven't seen you for a long time.
久しぶり
ひさしぶり
hisashiburi
