YOU SAID:

the assassin looked through his eyes at the man out the window

INTO JAPANESE

暗殺者は窓の外の男に彼の目を通して見ました

BACK INTO ENGLISH

The assassin saw through his eyes the man outside the window

INTO JAPANESE

暗殺者は彼の目を通して窓の外の人を見た

BACK INTO ENGLISH

The assassin saw a person outside his window through his eyes

INTO JAPANESE

暗殺者は彼の目を通して彼の窓の外の人を見た

BACK INTO ENGLISH

The assassin saw a person outside his window through his eyes