YOU SAID:

as that would cause him to lose sleep at night.

INTO JAPANESE

それは夜に彼が眠りを失う原因になるからです。

BACK INTO ENGLISH

It causes him to lose sleep at night.

INTO JAPANESE

彼は夜に眠りを失います。

BACK INTO ENGLISH

He loses sleep at night.

INTO JAPANESE

彼は夜に眠りを失います。

BACK INTO ENGLISH

He loses sleep at night.