The grassland of Aso is decreasing due to ageing farmers and the deterioration of the livestock industry due to the liberalization of beef. If the situation continues in this way the grassland would vanish in ten years' time which creates a danger of extinction of organisms growing and living in the grassland. The organization continues trust activities focusing on the regions where rare herbivorous plants are concentrated in the Aso area – for the past five years since 2004, we have conducted traditional grassland management techniques such as grass cutting and burning to clear 5 ha and ultimately regenerate into a biodiversity rich grassland. This project includes felling forests planted with Japanese cedar trees that have been neglected for 50 years and returning it to grassland by burning the surrounding abandoned land – further work includes grass cutting and collection in order to regenerate the grassland to an area where flowers can grow. After burning the area, vegetation and flora is investigated in collaboration with local farmers, universities and related organizations in order to accumulate scientific data including strain and seed of lilies and adonis. This contributes to the regeneration of grasslands and maintains the biodiversity of the Aso grassland vegetation, restoring the old grassland system and increasing the opportunity for use of grassland by local people.