YOU SAID:
I haven't seen you since last decade!
INTO JAPANESE
過去10年以来、私はあなたに会っていません!
BACK INTO ENGLISH
I have not seen you since the last 10 years!
INTO JAPANESE
過去10年間以来、あなたに会っていません!
BACK INTO ENGLISH
I haven't seen you since the last 10 years!
INTO JAPANESE
過去10年以来、私はあなたに会っていません!
BACK INTO ENGLISH
I have not seen you since the last 10 years!
INTO JAPANESE
過去10年間以来、あなたに会っていません!
BACK INTO ENGLISH
I haven't seen you since the last 10 years!
it is unlikely that this phrase will ever reach equilibrium