Sumitani Mariko(住谷真理子)

Sumitani Mariko is a Japanese Adult Video (JAV) actress who debuted around 2007. Based on available information, her career appears to have been relatively short, spanning perhaps a year or two. Her work primarily falls within the mature woman ("jukujo") genre, often featuring themes of infidelity ("hitodzuma/shufu"). The titles and genre tags associated with her films indicate a focus on scenarios involving amateur-like settings ("shiroto"), riding positions ("kijoui"), and more explicit acts. Her work seems to have been primarily associated with studios such as Crystal Eizo and Madonna. She appeared in series like "Hatsu Nugi Jukujo" (First Time Nude Mature Woman) and "Hame Kurui Inran Jukujo" (Sex Crazed Lewd Mature Woman), suggesting a consistent branding within the mature woman niche during her active period. Her style appears to have been centered on portraying a sexually liberated mature woman within a range of explicit scenarios.