Mirei Kato (b. 1990) is a Japanese-Finnish costume designer, who works with fiber, space, and textile art. Mirei has a Master of Arts degree from Aalto University (2024), and a degree in sewing – specializing in theatre costumes and historical costumes. She has also studied Textile Art and Design in Kyoto in 2019-2020 and 2023.

In addition to her work with costume design in performing arts and film, she has increasingly worked in the field of visual arts – especially textile, fiber, and spatial arts. In her artistic work, Mirei explores ideas related to the connection with nature, the meaning of roots and traditions, as well as experiences of cultural identity, such as belonging and not belonging. Her material-based work is often done in process with discarded textiles and natural plant fibers such as parts of alien plants. Mirei’s works also deal with time and temporality, which are present especially in the sense of continuity through the reinterpretation of traditional craft methods and working with reusable materials.