In Yawatahama, Japan, a collaborative effort between Shikoku Electric Power Co., Tokyo University of Agriculture and Technology, and other organizations is underway to explore the potential of microbial power generation in mikan (mandarin orange) orchards. By utilizing microorganisms in the soil that emit electrons and hydrogen ions during organic matter decomposition, a 'microbial fuel cell' is being tested to store electric charges for various applications. The project, initiated this fiscal year, aims to investigate how environmental factors like climate and seasons impact power generation. Future plans involve utilizing the generated power for 'smart agriculture' activities such as remote field monitoring. The innovative energy storage device developed by Tokyo University enables the output of significant electricity amounts for short durations, facilitating wireless data transmission. This sustainable approach to power generation eliminates the need for microorganism cultivation by utilizing on-site soil nutrients. Devices are buried in the soil, tapping into available resources for power production. The technology is anticipated to support aging mikan farmers by enabling remote monitoring of orchard conditions, potentially reducing the necessity for physical patrols on the challenging terrain. The team recently conducted voltage measurements in a mikan orchard at an altitude of around 200 meters in Yawatahama. Assistant professor Keisuke Matsumura emphasized the goal of utilizing local energy sources for agriculture and showcasing the utility of microbial power generation to a broader audience. Hiroyuki Mishima from Shikoku Electric Power expressed interest in leveraging the system to address local issues due to its simplicity and potential cost-effectiveness. This initiative highlights the advancement of renewable energy applications and the integration of innovative solutions in traditional agricultural practices.