The production of Koiminori rice begins by preparing the soil for ten years, then filling the fields with clean melted snow water from Mount Hakkai. Koi fish are released into the mud to stir and circulate oxygen, which not only helps to feed the rice plants with nutrients, but also gets rid of harmful insects without having to use chemical fertilizers. Grown in harmony with nature, Koiminori offers consumers with safe and delicious rice bursting with natural flavors.