I know you want japanese only, but our content is all shot in Thailand with real Thai models.
GhostCash Sites
http://www.asiansuckdolls.com
http://www.creampiethais.com
ButterflyBucks Sites
http://www.tailynn.com
http://www.tussinee.com
If its not what your looking for my apologies for recommending, but they are all very high-converting sites and I figured it would help.
Regards,