Sega recently announced that in 2012, there will be two concerts held on consecutive days at the Tokyo Dome City Hall. Sega is collaborating with MAGES(5pb) to bring this event to Tokyo on 3/8 and 3/9. There will also be an afternoon concert and an evening concert on both days. The first day (3/8) will be a Miku’s Live Party (MikuPa) 2012 live show, while the second day (3/9) is Miku’s (Thanks)Giving Day. Both afternoon shows open at 13:00 and start at 14:00, while the evening shows open at 18:00 and start at 19:00 Japan time. Tickets cost 6,300 each concert and sales begin on January 28th 2012 at 10:00 Japan time. There will also be a web raffle to win a chance to get the tickets early starting on November 23rd at 12:00, and ending on December 12th at 21:00. Hit the break to see the official video that Sega has released.
It is not really clear on whether or not these two concerts will be 100% new material, this should be new. It is also not known whether or not they will stream it live on Nicovideo/NicoNico, however if there is news about that, I will let you know.
Source: Sega PJD Blog, Official 39’s Giving Day HP