YOU SAID:
i have committed mass arson
INTO JAPANESE
私は大量放火を犯した
BACK INTO ENGLISH
I committed a mass arson
INTO JAPANESE
謝らなければなりません
BACK INTO ENGLISH
I have committed a crime.
INTO JAPANESE
謝らなければなりません
BACK INTO ENGLISH
I have committed a crime.
That didn't even make that much sense in English.