YOU SAID:
No one had seen him in 10 years
INTO JAPANESE
10年間誰も彼に会っていませんでした
BACK INTO ENGLISH
No one has seen him for 10 years
INTO JAPANESE
誰も彼に10年間会っていません
BACK INTO ENGLISH
No one has seen him for 10 years
Okay, I get it, you like Translation Party.