Yuriko Yamaguchi (山口 由里子, Yamaguchi Yuriko?, born November 21, 1965) is a Japanese voice actress who was born in Osaka. Previously a member of Vi-Vo, Yuriko is currently freelance. She is most known for the roles of Nico Robin (One Piece) and the second voice of Nurse Joy (Pokémon (anime)). Her hobby is overtone singing. Her nickname is "Yuruko". Yuko Kobayashi filled in as the voice of Nico Robin and Kikuko Inoue filled in as the voice of Nurse Joy while Yamaguchi was on maternity leave.