Koyama Sachiko(小山佐知子)

Koyama Sachiko is a Japanese Adult Video (JAV) actress primarily known for her work in the mature woman ("熟女" or *jukujo*) genre. Based on available information on her works, her career appears to have started around 2009 or earlier, and lasted for at least several years, with releases documented up to 2014. Her filmography suggests a strong focus on content catering to specific fetishes, including anal play, older women, and various niche interests like urination/bedwetting ("放尿・お漏らし"). Many of her works highlight her as a *jukujo*, often showcasing her in group scenes or compilations alongside other mature actresses. She is also seen in works that involve specific fetishes related to the rear, such as anal and "尻フェチ" (ass fetish) content. Throughout her career, Koyama appears to have remained consistent in her focus on the mature woman genre and related fetishes. She seems to have worked with studios such as Gen'eisha (現映社) and Ruby (ルビー) on numerous occasions, and has appeared in series like "五十路だよ！", "四十路 五十路 六十路 七十路", and "熟女恥悦放尿", indicating a level of collaboration and recurring involvement with these production houses. Her style generally involves showcasing her mature figure in a sexually explicit manner, often participating in group scenes and catering to a variety of niche fetishes within the *jukujo* category.