Miyahara Kai(宮原海)

Miyahara Kai is a Japanese Adult Video (JAV) actress who debuted around 2004. Based on available information, her career spanned roughly from the mid-2000s to the early 2010s. Her work primarily falls into the "mature woman" (人妻・主婦) genre, often involving themes of adultery (不倫). Many of her earlier works, particularly those from Crystal Eizo (クリスタル映像), feature tags such as "big breasts" (巨乳) and focus on outdoor/exhibitionist scenarios (野外・露出). She also appears in titles centered around "3P/4P" scenarios. Later in her career, Miyahara seemed to work more frequently with Next Group, appearing in titles that sometimes leaned towards a documentary style, exploring themes of infidelity and the realities of the adult entertainment industry. She also appeared in titles featuring cosplay and fetishes. She appeared in the "Harechi Kankan" and "The Tsumamigui" series. Overall, Miyahara Kai's career showcases a shift from more straightforward, genre-focused JAV to productions that incorporated documentary elements and explored themes of secret affairs and taboo relationships, while maintaining her core appeal within the mature woman niche.