A considerable amount of farmland was destroyed by a flood disaster that struck in 2012 in Yame and Ukiha, in Fukuoka prefecture, the northern part of the island of Kyushu, Japan. This paper is a case study of the volunteer farmland restoration activities carried out on the hilly and mountainous areas after the floods. This study aims to outline the activities in three regions and show the character of the volunteer farmland restoration groups. Interview surveys were conducted with the manager of each volunteer group, and data on the process of forming volunteer groups, the monthly process and distribution of activities, facilities requirements, and intermediaries between affected farmers and volunteer activities were collected through field surveys. The surveys were carried out from June to September 2014. It was found that conservation activities were being carried out in three regions before the year of the disaster. It is notable that Sansonjyuku, an established NPO in 1994, launched their activities in July, the month when the disaster struck. Activity areas by Sansonjyuku were unevenly distributed due to their experiences with volunteer activities in previous years. The other groups widely covered their areas because they carried out needs research on all local districts through ward mayors. Fifty to 75.9% of support activities were intermediated by someone, and the ward mayors fulfilled this role more than 50% of the time.