Collaborations with artists—like Tadanori Yokoo—would show her influence and cross-disciplinary work. Exhibitions in prestigious galleries like Paris' Musée des Arts Décoratifs and Tokyo's Mori Art Museum highlight her impact beyond just fashion.

In 1967, Fujishita launched her own line under the name Mame (a diminutive of "marame," a Japanese term for "delicate" or "small"), which quickly gained acclaim for its minimalist yet evocative designs. Her work stood out for its use of Japanese aesthetics —soft, flowing lines, asymmetry, and a reverence for natural fabrics—contrasting with the opulent styles of 1970s Paris. By 1977, she established her eponymous brand Rika Fujishita Mame in Tokyo and Paris, solidifying her reputation as a bridge between East and West.

Next, her work at Mame. She focused on feminine clothing, used soft fabrics like silk and satin. Her style was elegant, minimal, maybe contrasting with the more ornate French designs of the time. She incorporated Western techniques with Japanese aesthetics, which is a key point. Her use of colors like pastels and florals adds depth to her design philosophy.