http://click.dtiserv2.com/Click/1099002-99-us5873
DTI is a set of Japanese sites with English versions. Its the real-deal japanese stuff unlike a lot of the "asian" sites most big sponsors have. They have some really nice live chat. If a person wants Japanese porn, I can't imagine anywhere better to go.
On the downside, they don't make it very easy to get free content. They have lots, but you have to really dig around for it.
My link list is teen-x-tgp.com