The object of this study is to understand how the island inhabitants recognize their own living environment. The questionnaire was distributed on Osima Island in Fukuoka Prefecture. A Free Association Method questionnaire was used. This enabled the respondents to answer without being influenced by the researcher's intention. The descriptive words given in the survey sheets were analyzed using Quantification Method III and Cluster Analysis. As a result, we found the island inhabitants of Osima tend to have a good impression of their own living environment and consider the natural environment, especially the sea, as an important factor in their daily lives.