We have developed high-performance biochar (Chūtan) by adding soil microorganisms selected and cultivated using our proprietary technology. This agricultural material improves soil fertility and increases yields by 10% to 70% compared to chemical fertilizers, even when using organic fertilizers (results were achieved in more than 80% of test areas). It also shortens the time required for soil preparation from the usual five years to one month. This product is realized through multiple technologies, including the composition of a soil microbial consortium utilizing sake fermentation technology. It also contributes to decarbonization in agriculture by storing CO2.