God Eater, Namco Bandai's Monster Hunter clone, is popular in Japan. So popular that it recently had its own festival in Akihabara, complete with some cosplayer lady. Something is missing...
Oh, right. A LARGE SWORD. So there you go!
Monster Hunter also has had its own festival in the past. So a God Eater festival is really par for the course.
As of January 3 this year, the demo for God Eater had been downloaded over a million times in Japan, and when the title was released this February, Namco Bandai shipped a half million copies of the game.
Namco Bandai has recently revealed God Eater Burst for Japan. That's the updated version of the game that will be released in North America next year.
GOD EATERフェス 半ケツ下乳「アリサ」のコスプレ [アキバBlog]