Do the games have to be Japan only releases (e.g. Xenoblade, Tales of Graces and Reginleiv which have all so far come out only in Japan) or can they be any Wii game that has come out in Japan, regardless of whether they have also been published elsewhere?
If the latter, then fairly recent games that come to mind are:
Monster Hunter Tri , Fragile, Arc Rise Fantasia (in Japanese! NOT the Western version), Shiren the Wanderer, Silent Hill : Shatterred Memories, Legend of Zelda Twilight Princess (ok this one is not failry recent 
), Muramasa, Sin and Punishment 2.
I could recommend many more, I just had to stop somewhere. And I didn't even touch Wiiware and the VC.
Currently Playing: Shin Megami Tensei: Devil Survivor Overclocked, Professor Layton and the Curious Village
Anticipating: Xenoblade, The Last Story, Mario Kart 7, Rayman Origins, Zelda SS, Crush3D, Tales of the Abyss 3DS, MGS:Snake Eater 3DS, RE:Revelations, Time Travellers, Professor Layton vs. Ace Attorney, Luigi's Mansion 2, MH TriG, DQ Monsters, Heroes of Ruin
