This painting depicts a Caucasian man wearing authentic Japanese clothing and was likely a souvenir from Nee-Ban, which means No. 2 in Japanese. Nee-Ban was established in Chicago in 1884 and was an Exposition of the Arts and Manufactures of the Japanese Empire. It was modeled after Ichi Ban, meaning No. 1, which was an identical exposition produced in San Fransisco in 1881. Nee-Ban featured thirty Japanese artists, artisans, and embroiderers who created pieces using authentic Japanese methods. Examples of produced artwork included kimonos and portraits such as the one seen here.
For formal occasions, Japanese men wear a montsuki, a formal black silk kimono worn over a white under-kimono and hakama, which are traditional Japanese trousers. Men also wear zori, usually made of imitation plastic straw, but they are not required to wear tabi socks with their zori like women.