Here're some JRock concerts I know that will be taking place in Dec in Tokyo
1) BREAKERZ
They're doing their 1st house tour BREAKERZ LIVE TOUR 2012 "BEST" -LIVE HOUSE COLLECTION- in 3 years & it will start in Nov with the last day at 26th Dec which's the 1 that I will be going for
The last concert date for their house tour will be held at 26th Dec in SHIBUYA-AX
2) SPYAIR
SPYAIR will be performing at the Nippon Budokan on 18th Dec & it will be their very 1st time performing at the sacred venue
3) Acid Black Cherry
yasu will be staging his Acid Black Cherry 5th Anniversary LIVE “Erect” in both Nov & Dec
For Tokyo dates , it will be 2 ie. on 11th & 13th Dec . Both will be taking place at Yoyogi National Gymnasium