As the title states, let's go about a vote on the best current-generation Japanese rocket-propelled grenade.
We'll begin with nominations: each player gets three. Nominate more and none of your nominations count. At the end of some arbitrary but sufficiently long period, a poll will be posted with the ten most nominated titles. From there it's typical voting.
Eligible platforms: Playstation 3, Xbox 360, Nintendo Wii, PC, PSP and DS-DSi.
Eligible regions: all.
NieR: Some of the best, most ensorcelling music to ever poison my ear-parts. Poison, yes, because they will never hear a more emotionally puissant tune again. Couple that with a game whose elements are a mottled gathering from many sources and a tragic story. Spell-fucking-binding.
Ar tonelico Qoga: Knell of Ar Ciel: Gust orchestrates many things: foremost, the marriage of visual novel and role-playing game. Not only are you threaded into the quilt of overlapping tales, but you nudge your way into the heart of the heroines. It's a shame that the game's image is... besmirched by its lascivious content. Yes, there is some lechery here, but it's the layer of milky film atop your favorite drink. In its maw roils a beastly stitching of captivating story, ear-swooning diapasons and gorgeous presentation.
Atelier Totori: Frock and filigree and—oh!—the delightfully flustered lass beneath.
Ar tonelico Qoga: Knell of Ar Ciel - 2
Atelier Rorona: The Alchemist of Arland - 1
Atelier Totori: The Adventurer of Arland - 3
Atelier Meruru: The Apprentice of Arland - 1
Dark Souls - 2
Final Fantasy XIII - 1
Final Fantasy Tactics: War of the Lions - 1
Hyperdimension Neptunia mk2 - 2
Lost Odyssey - 3
Magna Carta 2 - 1
Muramasa: The Demon Blade - 1
NieR - 2
Persona 3 Portable - 2
Record of Agarest War - 1
Resonance of Fate - 2
Rune Factory Tides of Destiny - 1
Sakura Wars: So Long My Love - 1
Star Ocean: First Departure - 1
Star Ocean: The Last Hope - 2
Tales of Graces ƒ - 6
Tales of Vesperia - 3
The Legend of Heroes: Trails in the Sky - 2
Valkyria Chronicles - 2
Valkyria Chronicles 2 - 1
Xenoblade Chronicles - 1
Ys Seven - 4
A generation, as defined by the industry, includes a family of systems released during a similar time period and generally placed against one another. They're core iterations. This generation, for example, is the end of the seventh generation (only eighth generation handhelds have been released).
PCs, of course, are above this. So they're hard to judge. But the best way of approaching that situation is to partition PC releases into time periods according to console generations.
Also what Prin said. I did list the current-gen platforms. We haven't quite transferred to the eighth generation yet.