The other day I met YOSHIKI.  I was at a showing of We Are X in Oslo, Norway.  Norway doesn't have a huge VK scene so I was happy he had come.  It turned out to be his first time in Norway.   I asked him "Can western bands be visual kei?"  -  He laughed and replied "Of course!"   So I followed up with "If a western band is to be visual kei, is there something they must adhere to, in terms of style or aesthetic?"   He explained VK is more of a mindset, born out of th