YOU SAID:

the boy died from death

INTO JAPANESE

少年は死により亡くなりました

BACK INTO ENGLISH

The boy died of death

INTO JAPANESE

少年は死んで死んだ

BACK INTO ENGLISH

The boy died and died

INTO JAPANESE

少年は死にました

BACK INTO ENGLISH

Boy died

INTO JAPANESE

少年が死んだ

BACK INTO ENGLISH

Boy died