Sawaguchi Yuu(沢口憂)

Sawaguchi Yuu is a Japanese Adult Video (JAV) actress who debuted around 2011, based on available information, suggesting a career spanning at least a few years. Her work catalogue, while not fully comprehensive online, indicates a primary focus on solo works and themes that heavily feature cunnilingus. The title "天国と地獄 感じだしたらとまらない 沢口憂" (Heaven and Hell, Can't Stop When I Feel It) is indicative of this specific genre inclination. It is difficult to ascertain a definitive genre evolution over such a limited publicly available work list. However, the presence of a "Best/Compilation" release early in her career suggests a certain level of popularity or recognition attained relatively quickly. Her work seems primarily associated with the studio Royal Art, based on the titles listed. It's unclear if she has worked extensively with other studios. The "爆烈" (Bakuretsu/Explosive) series appearance also points to her being involved in specific series releases. In summary, Sawaguchi Yuu's JAV career, as represented by available data, seems to center around solo work with a distinct emphasis on cunnilingus and is primarily associated with Royal Art. Further information would be needed to fully assess the scope of her career and any shifts in genre focus.