YOU SAID:

This party is the most astounding thing I've been to in decades

INTO JAPANESE

このパーティーは私が何十年にしてきた最も驚くべきことです

BACK INTO ENGLISH

This party is the most amazing thing I've done in decades

INTO JAPANESE

このパーティーは私が何十年もやった中で最も素晴らしいことです

BACK INTO ENGLISH

This party is the most wonderful thing I've done for decades

INTO JAPANESE

このパーティーは私が何十年もやった中で最も素晴らしいことです

BACK INTO ENGLISH

This party is the most wonderful thing I've done for decades