Mandarin Ducks, from the series "Kashinsai"

From the series Kashinsai, this hosoban urushi-e in the Art Institute of Chicago depicts mandarin ducks (oshidori), the iconic East Asian symbol of conjugal love and faithfulness. The mandarin duck pair, male and female together, was one of the most common kacho-e subjects in Japanese print and painting because of its long association with marital harmony and its strong visual contrast between the male's elaborate plumage and the female's quieter coloration. Shigenaga renders the pair in a riverside or pond setting, the male's distinctive sail-feathers and bright facial markings rendered through the hand application of multiple pigments in the urushi-e tradition. The Kashinsai series name (variously translatable but often associated with flower-and-bird studies) signals that the work belongs to a sustained kacho-e program rather than a single-sheet design. Mid-Edo bird-and-flower prints sit between the literati ink painting tradition and the vernacular print market, and Shigenaga's treatment honors both: the composition is poised and classical, the technique is the commercial urushi-e of the Edo print shops. The Chicago impression preserves the visual richness of the urushi-e palette better than most surviving examples.