An architectural design firm led by Ryuji Kojo and Toshihiro Obata. Based in Fukuoka, they handle a wide range of design projects nationwide, including commercial spaces, residential architecture, interiors, furniture, and products. Recent notable works include "GC Nagasaki Dental Station" (2023), "Sushi Koji" (2022), "fan" (2022), and "House in Unzen" (2021). Major awards include the GERMAN DESIGN AWARD 2024 GOLD (2023), KUKAN DESIGN AWARD 2023 (2023), JID AWARD 2023 Interior Product division (2023), JAPAN WOOD DESIGN AWARD 2023 (2023), and JID AWARD 2022 NEXT AGE division (2022).