A group of 12 editorial staff from Enterbrain (the folks that put out Famitsu in all it's various iterations) sat down and voted on the game they felt was the best title of the year in Japan without regard for sales figures, fame of the franchise, etc. Only one vote per person, game with the most votes wins. In the end, Oblivion took home the honor as the best game of 2007 with 5 votes. The tally was:
#1 - Oblivion (5 votes)
#2 - God of War 2 (2 votes)
#3 - Super Mario Galaxy (1 vote)
#4 - Legend of Zelda DS (1 vote)
#5 - Monster Hunter Portable (1 vote)