The ASA International Design Competition 2019 was dedicated to fresh ideas in sustainability – approaches so radical, unanticipated, and transformative they earn the epithet ‘uncanny’. ADF (NPO Aoyama Design Forum) was proud to support this competition.‘Uncanny sustainability’ should open a route to the logical next steps in eco-friendly architecture : a built environment that is no longer human-centric but dedicated to the well-being of all living beings. Sustainable architecture has taken great strides in minimizing the consumption of energy and other resources, but great challenges remain and they demand bold responses.