Quote Originally Posted by The Summoner of Leviathan View Post
Yuji is his given name, Horii is his family name. In Japanese his name is Horii Yuji.
Yes. It's better to call them given names and surnames. First and last are too ambiguous.

And um... unless you had a very special relationship with a Japanese person, you would never call them by their last name only. You'd need a suffix to go with the name.