Found in the old Zakon back area.
Uncle Carnell (Carnell Sanders) ofthe Kentucky Fried Chicken Akihabara store has changed his clothes from Halloween to Christmas.
This year, he is again dressed as Santa Claus.
Incidentally, in 2009, 2010, 2011, 2012, and 2013, he was dressed as Santa Claus in late October, but in 2014, the costume change was about a month late.