In Untitled [Untitled] (1967) [img. 33], two large, irregularly shaped black and yellow blotches of color occupy the canvas, in tension with one another. With its warm palette and composition of loose but well-defined forms, the painting demonstrates the influence of Japanese-Brazilian artists of the Guanabara Group, including Tomie Ohtake (1913–2015) and Manabu Mabe (1924–1997). Additionally, the weight and tension of the color field, forming a temporary architecture of color blocks, indicates influence from the work of American artist Mark Rothko (1903–1970).
— Guilherme Giufrida, assistant curator, MASP, 2018