The characteristic of his designs is a blending of deeply rooted Japanese traditions with western modernism to produce contemporary visual expression.
Ikko Tanaka's work includes the design of the symbols for Expo '85 in Tsukuba and World City Expo Tokyo '96. Amongst others he has worked for the Seibu Saison Group, The International Garden and Greenery Exposition, Hanae Mori, Issey Miyake, and the Mazda Corporation. Tanaka has curated and designed exhibitions for the Victoria and Albert Museum (London) and throughout Japan. He has designed the main logo of Osaka University.
Ikko Tanaka is also credited with developing the Muji together with Kazuko Koike (marketing consultant), and Takashi Sugimoto (interior designer). Tanaka articulated the Muji vision and appearance, and he provided ideas and prototypes that visualized the design strategy. He worked as Muji's art director until 2001.