■ D2S
D2S is a multidisciplinary design studio based in Japan (Niigata and Tokyo).
First-Class Registered Architect Office (Japan)
2026 : Renamed from HAFEN to D2S


■ Kou Honda
Principal, First-Class Architect (Japan)
After studying at the University of Applied Arts Vienna in Austria and completing his master’s degree at Tokyo University of the Arts in Japan, Kou Honda worked at NAP Architects and nendo before founding D2S.
He also serves as a part-time lecturer at Nagoya Institute of Technology.


■ Design Fields
・Art (primarily installations and site-specific works)
・Fashion, Wearable Products (including jewelry and watches)
・Industrial Products
・Furniture (built-in and freestanding)
・Interior
・Renovation
・Architecture
・Landscape
・Graphic
We also welcome inquiries about projects in new and emerging fields, as well as design challenges that extend beyond conventional disciplines.
When the final form or scale of a project has not yet been defined, D2S can propose the most appropriate scale, field, and form of design in response to its context and objectives.



■ Services
・Concept development, strategic planning, design, and design supervision
・Concept development, fabrication, and installation of artworks
・Architectural design and construction administration as a registered First-Class Architect Office (Projects in Japan only)
・Land-use planning and development
・Strategic planning and consulting for products, regions, environments, and facilities
・Prototype fabrication for products
・All other services incidental or related to the above