http://www.4gamer.net/games/300/G030056/20150526012/
1. D4: Dark Dreams Don’t Die -Season One- : 1,480円
2. D4 3 Boost Clothes (Lager, Ale & Stout) : 298円
3. D4 Art Book : 498円
4. D4 Script : 498円
5. D4 Mini Soundtrack (4 main tracks) : 398円
6. D4 DLC Pack (compilation of the DLCs 2~5 ; game isn't included) : 1,580円
7. D4 Deluxe Pack (the game and all DLCs above mentioned) : 2,980円
8. Swery Fan Back Outfit (Coffee) : 98円
9. Swery Fan Pack Outfit (Tequila) : 98円
Huh oh...
Don't know if it's a Steam, a Japanese or a Steam Japan "exclusive" pricing plan, but I don't really expected this.
I'm a little disappointed by this, the distribution plan and the overall pricing. I'll buy it day one, exactly like I did on Xbone (essentially bought for this game), but meh..
Also, the PR officialises the distribution of a trial version shortly after the game release.