Google stuff...
Results 1 - 10 of about 21,200,000 for anime
Results 1 - 10 of about 16,800,000 for manga
Results 1 - 10 of about 7,470,000 for hentai
Keywords
.....Clicks / Day
.....Avg. CPC
.....Cost / Day
.....Avg. Position
anime
............1,700.0
............$0.05
.........$85.00
.............1.4
hentai
..............810.0
............$0.05
.........$40.50
.............1.6
manga
..............370.0
............$0.05
.........$18.50
.............1.4
Just adding another difference between the words...