Mihina (みひな, Mihina, born July 13, 1995) is a Japanese AV actress from Kanagawa Prefecture. Her former stage names were Mihina Nagai (永井 みひな) and Mihina Azu (あず みひな). She is affiliated with Mine'S. Her body measurements are 85-60-95 cm (33-24-37 in) (D cup) and her height is 1.56 m (5′ 2″). Her hobbies include watching idol videos and retouching images.

She made her AV debut in June 2017 as Mihina Nagai (永井 みひな, Nagai Mihina). She belonged to NAX Promotion. On October 2, 2018, she transferred to Mine'S and changed her stage name to Mihina Azu (あず みひな, Azu Mihina). On June 18, 2019, she changed her stage name to Mihina (みひな). Despite the name change, some of her works in the second half of 2019 were still published under her former name Mihina Azu, depending on the timing of the filming and release date. She has also worked as an actress, challenging herself with movies in 2020 and stage plays in 2021.

Since her debut, she has played a wide range of roles, from schoolgirls to married women, with her round face and acting skills.