Ryō Kasumi is a Japanese voice actor also known by the name Mitsu Takashiro. Details about their career background and training are not documented in the available sources.

Kasumi's credited roles are primarily in original adult animation (OAV) series. These include the role of Konome Kiritani in Peace-Hame!, Princess Illeana in Buta Hime-sama, Makiko Endō in Sex Friends Convenience?, and Rie Morimiya in Teacher's Carnal Courses. Additional voice work in this medium includes a role in the series Inshitsu Otaku ni Ikareru Kanojo.

Beyond adult animation, Kasumi has performed in other media under the name Mitsu Takashiro. This includes a role as a nurse in the television anime series Tokyo Magnitude 8.0, as Dalia Basquiat in the visual novel Flowers -Le Volume sur Ete-, and as Mika in the video game Kurohyō: Ryū ga Gotoku Shinshō. Information regarding recurring collaborations with specific directors or studios, as well as formal awards or notable achievements, is not available in the sourced material.