So it seems like X Japan are doing a tour with VIP tickets available for entry to the soundcheck etc. Thought it might be worth posting as I don't seem to remember Yoshiki or the official page posting it~
http://xjapan2015.live-vip.jp/vma/Ticket sales page - (sales start Tuesday 25th August)
http://udo.jp/Artists/Xjapan/Seems rather short notice if it is legit lol, but then again X Japan do like to surprise people with last minute performances
December 2 (wednesday) 18: 00/19: 00 Yokohama Arena
December 3 (Thursday) 18: 00/19: 00 Yokohama Arena
December 4 (friday) 18: 00/19: 00 Yokohama Arena
December 7 (Mon) 18: 00/19: 00 Osaka Castle Hall
December 9 (Wed) 18: 00/19: 00 Marine Messe Fukuoka
December 11 (Friday) 18: 00/19: 00 Hiroshima Green Arena
December 14 (Mon) 18: 00/19: 00 NGK Hall
(My translate keeps on messing up the names of the venues etc )