Sekiguchi Mitsuko(関口美津子)

Sekiguchi Mitsuko is a Japanese Adult Video (JAV) actress known primarily for her work in the mature woman (熟女, *jukujo*) genre. Based on available information, her career appears to have begun around 2008 and extended at least until 2013. She has appeared in numerous titles across various labels. Her filmography highlights a strong focus on specific fetishes, particularly those involving urination (*hōnyō, omorashi*). Many of her films prominently feature this element, often combined with other mature-themed aspects such as blowjobs (*fera*), breast-play (*paizuri*), and the appeal of married women or housewives (*hitodzuma, shufu*). The titles and tags suggest a consistent dedication to these particular niches throughout her career, rather than a significant evolution in genre preferences over time. Sekiguchi Mitsuko has worked with several studios and makers, including Ruby, Nadeshiko, Gen'eisha, and Manbou. She has also appeared in several series, such as "Mature Woman Shameful Pleasure Urination" (熟女恥悦放尿), "Mature Woman in Her Prime" (性熟 ～女盛り～), "Single-Minded Forties and Fifties" (五十路四十路一筋), and "Big Old Woman: Eleven of Paradise" (大年増 極楽の11人). These series appearances indicate a certain level of recognition and demand for her specific performances within the mature JAV market. Overall, Sekiguchi Mitsuko's work is characterized by its focus on mature female sexuality and specific fetish elements, creating a niche appeal for viewers interested in these themes.