In response to global warming issues, homebuilders today are becoming keener on the delivery of zero-energy housing than ever. To stimulate homebuilders and housing researchers around the globe, knowledge transfer study visits to Japanese housing manufacturers were initiated in 2006. The event was later called ‘Zero-energy Mass Custom Home Mission to Japan’ and continuously executed in 2007 and 2008. As part of the mission results, 3 industry participants were transformed successfully from conventional housing suppliers to champions of net zero-energy/carbon homebuilders in their local contexts. This paper unveils the mission contents and examines the response from the industries.