The Onuma Geothermal Power Station is the third geothermal power plant in Japan with a long history of operation. It is still in operation, and management operations are designed to keep the geothermal power plant operating stably for a longer period of time. Management tasks include a 24- hour operation control, hot water piping maintenance, renovation work, regular inspections with the plant shut down for two weeks each year, and drilling of new replenishment wells.
We also conduct environmental monitoring on a regular basis to ensure that the plant does not affect the surrounding natural environment, and report the results to the Ministry of the Environment. We are proud of our efforts to provide a stable supply of energy through geothermal power generation,  a form of renewable energy, thereby contributing to a recycling-oriented and decarbonized society.
Compared to photovoltaic and hydroelectric power generation, geothermal power generation is said  to be a stable renewable energy source that is not affected by the weather or seasons. Strictly speaking, however, the high-temperature, high-pressure water extracted from production wells does not always gush out in the same way. Some production wells may be dormant for several months after a month of water discharge. Since we never know what is going on underground, we monitor pressure levels and manage multiple production wells to ensure a stable supply of electricity.
My mission is to make the Onuma Geothermal Power Station last even longer. Building a geothermal power plant is not an easy task. That is why regular inspections and daily maintenance are so important. Currently, we are moving forward with a revival plan to renovate and repair high risk facilities, and we are also planning to drill new reinjection wells this fiscal year. In addition, to improve the reliability of operations, a remote monitoring system has been introduced to strengthen the overall monitoring framework. Furthermore, we are digitizing on-site information and utilizing numerical management to detect problems quickly and work efficiently. By evolving our operational management in step with the times, we hope to contribute  to the continuation of long-term stable operations.