CDJapan has opened a preorder page for a Blu-Ray boxset of Kamen Rider Decade!
Released in 2009, Decade celebrates 10 years of the Heisei Rider Era and features special appearances by a variety of Kamen Riders.
This boxset will contain all 31 episodes of the series, including the SPECIAL EDITION versions of the finale. Release is currently scheduled for March 8, 2017! The price is a steep 35000 yen before shipping & handling.