So you'll be wondering what that big wall of text means at the base of last weeks post is. Well all I can say is that after a long time wrestling with Jim Breens online Kanji Guide I can say that this is sort of what it means. I'm nowhere near fluent (base Kana and a few stray Kanji learnt) so take this with a severe pinch of salt. I'll happily supply a better scan of the back sleeve, but be warned tiny black Kanji printed on what can only be described as the envelope paper you get bills sent to you on are not conducive to good identification.
2006. The Shibuya Scene. Yoshi Tsushima drawn to the genreless Jam session community, leaves his job at Victor Entertainment and in 2007 joined the session scene group Jamnuts (comprising one of the 30 or so members). They released a smash album, from which many of them would go on to be solo artists in their own right. From these roots it seems that he had quite a following.
From such a wide musicianship, drawing on a variety of black music* through to live improv, inevitably generates such strong performances, following this up with a best selling artbook / CD**. These unconventional artists with their rebellious styles, gain support from those artists affiliated to the Fuji rock festival, and were regulars of both these media.
Indie artists both from inside Japan and those underground artists further afield provided mixes to this making it the smash hit it is.
* You can listen to them cover Outkast's Hey Ya here.
** A cursory search comes up nothing, unless I've mistranslated (and that's a distinct possibility) then its not on line. But here is a small something that you browser will auto translate, here.