Kiki Trick, sound-based minigame game made by the WarioWare team for the Wii. Looks very cool.
3DS lineup for the next few months in Japan:
1/12: Ghost Camera
1/12: Ace Combat 3D
1/19: Rhythm Thief R
1/19: Beyond the Labyrinth
1/26: Resident Evil Revelations
2/24: New Love Plus
2/16: Tekken 3D Prime Edition
2/16: Theatrhythm Final Fantasy
2/23: Harvest Moon: Hajimari no Daichi
3/1: Mario and Sonic at the 2012 London Olympic Games
3/8: Metal Gear Solid 3D
3/8: Hatsune Miku and Future Stars Project Mirai
3/8: Girl's RPG
3/15: Dynasty Warriors
Next March - Kingdom Hearts: Dream Drop Distance
3/22 - Kid Icarus: Uprising
4/19 - Fire Emblem 3DS
New Bravely Default trailer
eShop announcements nothing of note
This is a Badass lineup! The best I see for a beginning of year.