Go here to see the items.
The sale lasts June 14 - June 21. If you're buying anything over 5000yen, they also have a promo going on until June 30th where you can get 1000yen back if you use Paypal.
Just remember, Japanese DVDs will only play in region 2 or region free DVD players and will require you to change the region on your computer to play them unless you use players like VLC or GOM player. Many blu-rays are region free, but for those that are not here are the region codes.