Along with Japan Airlines, we implemented a Japan-first initiative for domestic manufacture of aviation biofuel using waste cotton-based fabrics as a raw material. To realize the concept of “using recycled clothing to fly planes,” we called for donations from many companies and individuals, resulting in some forty participating companies and organizations collecting approximately 300,000 articles of clothing. Cotton fibers in that used clothing underwent a process called saccharification, producing raw materials allowing the Green Earth Institute to manufacture an aviation biofuel, using a process developed by the Research Institute of Innovative Technology for the Earth. This success was exemplary of a circular economy involving customers throughout Japan.