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 Hisama joined to KDa as a key member. Representative works are Daikanyama T-SITE / Tsutaya Books (2011), GINZA PLACE (2016) and Open House (Bangkok, 2017) ) and some of the winning awards include American Retail Environment Awards, D & AD Awards, World Architecture Festival Awards, Wallpaper * Design Awards and Design for Asia.

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.

Klein Dytham Architects (KDa) is a multilingual office founded in 1991 by Astrid Klein and Mark Dytham, who designs multiple fields such as architecture, interiors, public spaces and installations. Since 1996, Yukinari Hisayama has joined KDa as a major member. Representative works include Daikanyama T-SITE / Tsutaya Bookstore (2011), GINZA PLACE (2016), Open House (Bangkok, 2017). He has received numerous awards including the American Retail Environment Awards, D & AD Awards, World Architecture Festival Awards, Wallpaper * Design Awards, and Design for Asia.

Invented by the two in 2003, "Pecha Kucha Night" has spread around the world as a place for designers and creators to share their creativity with each other, and is now a global event held in about 1,200 cities. Growing.