D Code
D Code is a symbol mark based on traditional Japanese aesthetics and the idea of natural harmony. The composition follows the Silver Ratio of 1 to 1.414, known in Japan as the Yamato Ratio, a proportion long used in Japanese architecture and art. The form combines the five vowels of the Sacred Mizukuki Characters into a single shape. D Code is built in three layers: a white symbol, a mandala of 25 Mizukuki patterns, and a black symbol, reflecting the balance of yin and yang. The layered structure is reproduced with traditional Ukiyo-e printing techniques.
D Code Symbol Mark by Hikaru Deguchi was recognized as an innovative illustration of communication design by the A' Design Awards. D Code Symbol Mark was awarded the Iron A' Design Award in Graphics, Illustration and Visual Communication Design in 2025. The A' Graphics, Illustration and Visual Communication Design Award is a juried, academic and highly prestigious design award which rewards exceptional design of logos, posters, infographics, brochures, packaging designs, business cards, book covers, billboards and more.
