Born in Tokyo in 1929. She studied under Nobuya Abe and Yoshishige Saito. From 1957 to 1966, she stayed in various parts of Europe and the United States and engaged in creative activities. She creates three-dimensional works in brass, stone, and glass, as well as oil and ink paintings. During her stay in Milan and Paris, she produced abstract paintings with uneven surfaces mixed with marble powder, but from the mid-1960s, when she returned from New York, she shifted to producing sculptures mainly using metal. She is currently known internationally as the artist of a series of sculptures, UTSUROHI.

A series of flat works titled WORK (around 1960) is a series of works in which she used paint mixed with marble powder to create a subtle relief pattern reminiscent of birds, which she repeated on a flat surface with variations. The reliefs of paints mixed with stones, which rise slightly from the surface and show a subtle interplay of light and shade, appear differently from moment to moment depending on the lighting and the viewer’s changing position. What is important to Miyawaki in this work is not the brushstrokes themselves, but the sculptural sensation of applying, or imprinting, paint containing marble powder onto the canvas with a palette knife. This sensation developed into a series of three-dimensional works made of brass pipes in the mid to late 1960s.