After the strong earthquake that hit Central Java at the end of May 2006, staff and trainees of Indonesian OISCA training centers immediately started their emergency aid. Fortunately, many aid agencies also rushed to the devastated areas to carry out their aid operations with a lot of relief supplies which soon relieved the victims' acute sufferings. After their emergency aid, in view of the importance of supporting long-term efforts for rehabilitation and rebuilding of the disaster-stricken areas, the OISCA team undertook the re-construction of buildings of eight primary schools that collapsed in the earthquake. Out of them, six schools, namely, １．SDN 1 Kebondalem Lor, ２．SDN 1 Kemudo, ３．SDN 1 Dompyongan, ４．SDN 3 Cawas, ５．SDN Kowang, ６．SDN Ngrancah, were constructed with the financial support of the Japan Jakarta Club, an association of business people based in Jakarta. The inauguration ceremony was held on 18 October. The OISCA team continues to work in rebuilding two other schools supported by YAMAHA.

　OISCA headquarters dispatched two experienced carpenters as volunteers to help with the construction work. They returned to Tokyo on 27 October 2006 and reported to the headquarters' officials on the construction work, including their interaction and cooperation with local people.

　Before starting actual construction work, members of the OISCA team visited different villages to select schools to be reconstructed. They wanted to make villagers well aware that schools are assets of villages and all villagers. They held meetings for three times per school with village people and asked members of the community, particularly members of the PTA, to take part in the actual construction work as volunteers. Initially many people were not interested in working together, but Indonesian communities have the tradition of "Gotong Royong", or mutual help. Gradually they understood the significance of their participation and cooperation in the construction work. Whether or not one has skills to be utilized, one can do something as his/her contribution. Schools to be reconstructed were selected based on how badly the reconstruction was required, and also the enthusiasm of the members of the community. “I think that people of those villages have obtained two assets, new school buildings for their younger generation, and a revival of Gotong Royong spirit,” said one of the volunteer carpenters, Mr. Mitsuo Horii.