Here are a few more Japanese sponsors:
Digital Dope - Forbidden Tokyo
Pay Serve - Teens From Tokyo - Hairy Tokyo Teens - Tokyo Group Sex
Sextronix - Erotic Japan
Flash Cash - Fuck Japan
Spa Cash - Japan 18
Compu Dollars - Japan Coeds - Japan Orgy
Archive Cash - Japan Mega
Dollar M[/B]achine - Tokyo Bitches
DP Bucks - Unseen Japan
I hope they work out for you.