Just found her. Hitomi Kizuki. She has a pretty fat ass.
There is a torrent for this on Javjunkies and links on I-jav.
http://i-jav.com/censored/ups/upsm-214-hitomi-kizuki-amateurs-first-time-on-film-she-has-a-small-face-and-she-undressed-to-reveal-a-killer-body-with-fat-in-the-right-places/