YOU SAID:

I swear this is the first time that's ever happened to me.

INTO JAPANESE

こんなことは私にとって初めてのことだと断言します。

BACK INTO ENGLISH

I can safely say that this is a first for me.

INTO JAPANESE

これは私にとって初めてのことだと言っても過言ではありません。

BACK INTO ENGLISH

It's no exaggeration to say that this is a first for me.

INTO JAPANESE

これは私にとって初めてのことだと言っても過言ではありません。

BACK INTO ENGLISH

It's no exaggeration to say that this is a first for me.