Klein Dytham architecture (KDa) is a multi-disciplinary design practice, based in Tokyo, known for architecture, interiors, installations and PechaKucha Night, the creative presentation format that is now active in over 1,200 cities globally. Representative architectural works include Daikanyama T-Site/Tsutaya Books (2011), Ginza Place (2016), Open House (Bangkok, 2017), PokoPoko Clubhouse/Risonare Nasu (2020), Cartier Facade Osaka (2021). KDa is the recipient of numerous international awards including the prestigious Design For Asia Grand Award 2012, 2016 and 2017, and Astrid and Mark are co-founders of DESIGNART.