The book (in Japanese) includes in a first part a catalogue of ideas for a sustainable city developed by students during fifteen international workshops on the theme of “Sustainable solutions for urban ways of life”. The second part is about scenarios that have been developed to give a better understanding of the way sustainable solutions could be part of our daily life, considering some daily functions and developing design proposals to answer the questions they raise. (This book contains actually a translation in Japanese of some elements of “Sustainable Everyday, Scenarios of urban life” that has already been published in Italian and English.)