Nao Oikawa appears in several TV shows ---
Fantasma, Great Horror Family (both available in North America from Bandai Entertainment), Engine Sentai Go-Onger, live action Negima!
Maria Ozawa appears in some Taiwan slasher flick, and appears in
Maid's Secret: Welcome Home (available in North America from ADV Film's Switchblade Pictures imprint)
Speaking of Maria Ozawa, she's insanely popular right now, several JAV sites selling the latest Sky Angel vol. 87 have her ranked at #1 on pre-orders and it's been like that for weeks. Personally I don't really see the appeal other than her exotic French Canadian-Japanese look --- her sex scenes are mediocre, voice and pumping don't sync, sometimes she keeps the moaning up even when it's evident that the man already withdrew, it's like, on English anime dubbing levels of terrible.