Miyako Island depends entirely on groundwater, which has been contaminated by chemical pesticides from agriculture. To address this, we tested Bacillus thuringiensis (strain 22) and bagasse charcoal from sugarcane waste. The charcoal absorbs pesticides, and the bacteria degrade them while also producing insecticidal proteins. Field tests showed improved crop germination without chemical pesticides, suggesting a sustainable and safe alternative. We aim to promote this method locally and globally.