̣kay ill explain Sarutobi is his family name but you say the family name first in japan. so his name is Sarutobi Sandaime(dont know first name replaced with sandaime) but if he was to move to America his name would become Sandaime Sarutobi. and mostly you call everybody by their family name in japan like Uzumaki-kun for naruto. they also do this in most animes that is set in japan. but in naruto they almost only use their first name. i think mostly since many ppl got the same last name like hinata and neji. asuma and sandaime and konohamaru.