This study examined the role and significance of the community hub reusing the closed school "TSUKU-RASSERU" in the mountainous area of Toyota City, Japan. The following points can be found as the results of analyses based on the published materials and the data collected by the observation survey. Firstly, the continuous relationship between local entities has created diverse activities in "TSUKU-RASSERU." Secondarily, "TSUKU-RASSERU" plays the role of the catalyst for the creation of new activities. Thirdly, most connections between the entities in "TSUKU-RASSERU" come from the activities in the free-use spaces on the ground floor.