i found it several days ago and all the latest informations about big bang i can know from it. their new japanese single "gara gara go" are now published and it is now in a top ranking of youtube views.
their japenese comersial name are:
g-dragon : g-dragon
seungri : V.I
seungri : V.I
dea sung : d-lite
tae yang : sol
t.o.p : T.O.P