YOU SAID:

my fault, my own grievous fault

INTO JAPANESE

私のせい、自分のあやまち

BACK INTO ENGLISH

It's my fault, my mistake

INTO JAPANESE

私の間違い、私のせいです。

BACK INTO ENGLISH

It is because of my mistake, I.

INTO JAPANESE

私の間違いのためです。

BACK INTO ENGLISH

It is due to my mistake.

INTO JAPANESE

それは私の間違いによるものです。

BACK INTO ENGLISH

That is due to my mistake.

INTO JAPANESE

それは私の間違いによるものです。

BACK INTO ENGLISH

That is due to my mistake.