Abstract
This study focused on the multi-generational workshop as a method that makes collaboration between adults and children. Experimental workshops were conducted in Yakushima Island, a Natural World Heritages Site, to clarify the effect of the collaboration of different generations. Analyzing workshop products and questionnaires, following conclusions are derived: 1)many opinions produced by the workshops were shared among the different generations, 2)children tended to complain about their environmental situation, so that sustainable dialogues for the learning process should be continued, 3)some children belonging to the mixed group changed their opinion about the reduction of public constructions through interactive information exchange.