The Blue & Green Art Project initiated its activities in 2020 with the goal of fostering regional sustainability through the connection of sea and land. This time, we introduced the perspective of wellbeing. The theme for this year's project was "Well-being by Sea and Land: Happiness is Found in Handicrafts". This thesis focuses on ‘Sustainable Handicraft Tradition and Design in Yamaguchi’, examining the mental, physical, and social wellbeing that handicrafts bring to people. It explores the dilemma between conventional handicrafts and design, delving into the study of wellbeing. Simultaneously, it archives presented in the exhibition ‘Happiness is Found in Handicrafts’ and explores new expressions of handicrafts. Concerning the tradition and transmission of handicrafts, the workshop was revealed as both a place of encounter and a valuable tool for discovering the inheritors.