- Gender: Female
- Birthday: 1987-08-19 ( 36 years old )
- Place of Birth: Yokohama, Kanagawa Prefecture, Japan
- Also Known As: 西原 亜希 / 西原亜希 / にしはら あき
Aki Nishihara (西原 亜希, Nishihara Aki, August 19, 1987) is a Japanese actress from Yokohama City, Kanagawa Prefecture. She is affiliated with Fujiga office. She is 161 cm tall and has bloodtype O. After working as a model for magazines, she made her drama debut as an actress in 2003.