my guess would be ayumi as she release often singles/album does tours all over japan, appears in CM
as for the
that changes all the time while ayumi may not be no.1 for a year that dont mean the years b4 she wasnt. atleast a few times and unlike hikaru. ayumi often release stuff..
example - hikaru,single/album lately havent sold that great. lets say with her coming in 9th place this year on
higest tax payers would that make her Poor? when she top the list the years b4 ?
i don't think we will ever know how many million $$
Ayu
hikki
B'Z
Smap
ectz really have on their bank acounts