Asagmi was born in Otaru, Hokkaidō. In 1952, she began to study traditional Japanese storytelling kōdan under the master Ichiryūsai Harumi [jp] (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 nameIchiryūsai Harumi (一龍斎 春水). Since 2012, even the work of voice actor has started using the name of Ichiryūsai Harumi.
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