B'z it's not a 'boy band', it's just a two men group. SMAP is a boyband, Orange Range is not [their music is crap 'tho], nor is B'z.
By the way, can people plase stop thinking that is a Japan thing man always being on the top. It's not. It's a universal thing, like in US, just, like, 8 female artists sold over 10 million copies, and more than 20 boybands/bands/males sold that. PLUS, most of the best-selling singles in Japan are from females artists, at least the top 10 (three by Hikki; one by Ayu; one by Mai Kuraki. The other is Globo, two B'z greatest hits and mm, don't remember, dreams come true, maybe?)
Sorry for the rant
