Sakai’s undulating compositions are instantly recognizable as part of his signature aesthetic. What makes his paintings distinct from those of other artists engaging with geometric abstraction is how the fluidity and synthesis of colors that form curvatures and undulations juxtapose the rigidity of the clearly defined bands of color. His work was thereby defined by a dialogue between organic form and precise structure. For Sakai, color harmonies produced a sense of purity by reducing the compositions on the canvas to the rhythms produced from the interactions between different hues.