YOU SAID:

I have no memory where that came from.

INTO JAPANESE

私はから来た記憶があります。

BACK INTO ENGLISH

I from have a memory came.

INTO JAPANESE

私からはメモリ来てをいます。

BACK INTO ENGLISH

Comes from my memory is.

INTO JAPANESE

私の記憶からです。

BACK INTO ENGLISH

It is from my memory.

INTO JAPANESE

それは私の記憶からです。

BACK INTO ENGLISH

It is from my memory.