The Toyota Motor Corporation (Toyota) Frontier Research Center is dedicated to providing freedom of mobility for all. To that end, it is engaged in research into robots that live in harmony with people. The Frontier Research Center has adopted co-creation research, which is a collaborative approach to research whereby researchers around the world are free to participate as they choose. Here, we ask researchers Yuuka Hashiguchi and Yasukata Yokochi why Toyota has chosen a co-creation approach to developing robots, and we also hear about the latest results of their research.