Since 2012, the Japanese Red Cross Society has organized a disaster prevention volunteer group (SIBAT) in the disaster-prone country of Indonesia. The purpose of this research was to clarify the actual situation of SIBAT's activities and their impact on the community. A focus group interview survey was conducted with 39 SIBAT members in four villages in the Indonesian province of Central Java.The results are as follows: (1) SIBAT has conducted a wide range of activities, participation in which has been inclusive of Indonesian residents. (2) Despite the existence of some issues related to the enhancement of SIBAT's activities, the group has effected changes in the community, such as improving disaster prevention awareness and disaster response capabilities.