Klein Dytham architecture (KDa) is a multi-disciplinary design practice known for architecture, interiors, public spaces and installations. Established by Royal College of Art graduates Astrid Klein and Mark Dytham in Tokyo in 1991, today KDa is a multi-lingual office with an international reputation and a high-profile client list. In 1996, Yukinari Hisayama joined to KDa as a key member. Representative works are Daikanyama T-SITE／Tsutaya Books (2011), GINZA PLACE (2016), Open House (Bangkok, 2017), PokoPoko Clubhouse／Risonare Nasu (2020), Cartier Facade Osaka (2021) and some of the winning awards include American Retail Environment Awards, D&AD Awards, World Architecture Festival Awards, Wallpaper* Design Awards, Design for Asia and Dezeen Awards. In 2003 Mark and Astrid devised PechaKucha Night as an event for Tokyo designers to meet and share their work – it has now grown into an international network with events running in over 1,200 cities around the globe, inspiring creatives worldwide.