Yōko Asagami (麻上洋子, Asagami Yōko, born July 10, 1952) is a Japanese voice actress who is represented by Aksent. She is most known for the roles of Yuki Mori (Space Battleship Yamato) and Saeko Nogami (City Hunter). Her married name is Yōko Ōkubo (大久保洋子, Ōkubo Yōko).

Asagmi was born in Otaru, Hokkaidō. In 1952, she began to study traditional Japanese storytelling kōdan under the master Ichiryūsai Harumi (一龍斎貞水). By 2004, she had risen to become a star kōdanshi. When she performs as a storyteller, she goes by the art name Ichiryūsai Harumi (一龍斎春水). Since 2012, even the work of voice actor has started using the name of Ichiryūsai Harumi.

In 2022, she won the Merit Award at the 16th Seiyu Awards.