Waka Ninomiya (二宮 和香, Ninomiya Waka, born April 19, 1991) is a Japanese AV actress who is affiliated with Fun Star Promotion. Her height is 1.54 m and her body measurements are JP 85-58-85 (US 33-23-33) (H cup). Her hobbies and special skills are playing the piano and violin.

In September 2015, she made her debut as an exclusive amateur for adult video creator SOD Create's label "Fukushoku AV Joyū" (part-time AV actress). Her main job was said to be an elementary school music teacher. In January 2016, she became an exclusive actress for E-BODY under the stage name Chinatsu Nomi (能美ちなつ, Nomi Chinatsu), where she was advertised as a former idol and married woman.