The local governments in Japan are facing some common issues, such as aging population, population decline, environmental deterioration of child care and education, and financial difficulties. It is important not to rely only on public services for these issues, let each citizen solve them by "sharing", to realize a sustainable and livable town development while reducing the burden on local governments is the purpose of "Sharing City." Under the slogan "From public assistance to mutual assistance", we are now working towards "regional creation" in the 21st century by utilizing sharing economy service and working on solving regional issues under the support of Sharing Economy Association, Japan.