Yamauchi Mizuki (2022) Yamauchi Mizuki (山内瑞葵) is a Japanese pop singer and idol managed by DH. She is currently a member of AKB48 Team K. Yamauchi Mizuki (2022) Yamauchi Mizuki (山内瑞葵) is a Japanese pop singer and idol managed by DH. She is currently a member of AKB48 Team K.