Talk:Koutarou Amon/@comment-26451708-20150604080556/@comment-10733658-20150604175033

Japanese names are "Surname" first, "Personal name" second.

So his personal name is Koutarou (which only his father calls him) and his surname is Amon (which everyone else calls him).

Likewise, Kaneki's personal name is "Ken", but almost everyone calls him by his surname.