It seems like McDonald's is trying out a new marketing strategy in Japan that has ninja-like stealth: no-brand, no Golden Arches, ... and even no clown!
Neil Duckett went to the fast food restaurant, simply called "Quarter Pounder" in Shibuya and took some photos: http://neilduckett.com/quarter-pounder-opens-in-shibuya-omotesando/ - via Inventor Spot
(Kinda reminds like that Nazi-themed bar from a few years ago... http://www.time.com/time/asia/magazine/2000/0605/southkorea.trouble.html )