The ADADA logo was specially created by renowned Japanese graphic designer Hisayasu Ihara.
Hisayasu Ihara is Professor at the Faculty of Design, Kyushu University, Japan. He specializes in the history of graphic design. He has conducted research on Isotype, particularly in relation to the activities of Rudolf Modley in the United States. He is a co-author of the many books including Isotype: Design and Context (2013, Hyphen Press).
The ADADA original character "ADADA-chan" was created by Kazuya KIMURA.