In japan (first name) is family name and last name Is your name right?

Question:

example take from koda kumi .

koda is family her name and kumi is her name. right ??? (i don know)

if someone (like friend , family ,sister ,brother ,co-worker ,fan ) who call her name, the people must

say what first or last name??? and it necessary must put -chan -kun -san ....???

and why sometimes koda kumi and sometimes kumi koda????

(sorry if my english is bad)

Answer:

>koda is family her name and kumi is her name. right ??? (i don know)

Yes, you are right.

>if someone (like friend , family ,sister ,brother ,co-worker ,fan ) who call her name, the people must
say what first or last name???

First (family) name is used mostly. Only close friends or families use the given name.