Early purchase of Ken Hirai Films Vol.14 『Ken’s Bar 20th Anniversary Special !!』DVD/Blu ray will include a double sided clearfile as a bonus item while stocks last
Online stores giving away the clearfile include :
Tower Records Japan
HMV Japan
Sony Music Shop
TSUTAYA
Amazon Japan
Rakuten Books
Neowing / CDJapan
http://www.sonymusic.co.jp/artist/KenHirai/info/500931