Sadamasa Motonaga's "Vertical and Horizontal Fillet Black White" demonstrates the artist's commitment to geometric abstraction through carefully balanced compositional elements rendered in acrylic on canvas. The work employs a restrained palette of black and white to explore the interplay between vertical and horizontal forms, emphasizing the foundational principles of spatial organization and visual rhythm. As a member of the Gutai movement, Motonaga's practice reflects the group's interest in pure abstraction and the expressive potential of fundamental geometric relationships.