Overall, his art career showed an unusually smooth progression. Okada's painting subjects included both landscapes and portraits, and he was especially good at painting portraits of women. Under his brush, women were portrayed with warm skin textures, elegant features, and delicate traits. In 1907 he won the first prize of the Tokyo Industrial Exhibition for "Image of a Woman (Purple tone)". Later, he exhibited "Women in Red", "Japanese Bush Clover", and the "Portrait of Marquess Ookuma's Wife", establishing his reputation in painting portraits of women.
