His signature style, often termed "Ueda-cho" (Ueda-style), featured subjects—frequently family members wearing bowler hats or holding umbrellas—arranged like silhouettes in a dreamscape. This playful yet meticulous approach blended Western avant-garde influences with a distinct Japanese sensibility.
Today, Ueda is recognized as one of the most innovative figures in 20th-century photography, leaving behind a legacy of quiet, poetic mystery.