Masuho Ohno (Japanese, b. 1936). Tempera on panel depicting repeating op-art geometric forms in a grayscale pattern. Signed and inscribed 70-I-1 along the verso. With a certificate of authenticity by the director of the Gallery Coco, Kyoto, Japan. Sight; Height: 28 1/4 in x width: 23 1/2 in. Framed; Height: 29 in x width: 24 1/4 in.