Rensui was born in Yokohama, Kanagawa. After graduating Aoyama Gakuin University College of Science and Engineering, she studied under calligrapher Souun Takeda and obtained the title of Shihan (master instructor). To further pursue her career she studied under ink-wash painting artist Tohun Kobayashi and calligrapher Soryu Takeda.
She has received a number of awards for her calligraphy. And her one-of-a-kind ink-wash painting has been seen in various projects, such as lampshade design and mural paintings, beyond solo exhibitions.