When launching a new power plant in Mitsubishi Materials’ geothermal power generation business, the planning department conducts a business feasibility assessment to determine risks and profitability, and after conducting various explorations and surveys with skilled techniques onsite, we decide to commercialize the project.

I am involved in planning and promoting new projects in our renewable energy business, which includes geothermal power generation.
Currently, the planning and technology departments promote new projects, while dividing up roles between them.
Up until last year, the planning and technology departments were not separate, and all the staff involved  with geothermal development were in Tokyo, so those in charge would have to travel to the site each time surveys or construction were to be carried out.
However, since this year, we have placed the technology department in Kazuno City, Akita Prefecture, where our fields are concentrated. This allows us to respond swiftly onsite. The planning department gathers the latest industry information and draws up plans in Tokyo, while the technology department focuses on technical aspects such as surveys and drilling. In this way, we have established a system that develops the locational advantages and the areas of expertise of each department.
Our strength lies in the technological capabilities we have developed over 50 years of geothermal development. We believe it is necessary to pass on that strength while also keeping up with the latest technologies and changing social needs. This will enable us to respond flexibly to the development of various geothermal and other renewable energy sources.
In recent years, decarbonization efforts have come to be directly linked to corporate value and community revitalization. Moving forward, I would like to be able to work not only for the company’s profits, but also to improve corporate value and contribute to the local community. To this end, I need to understand not only knowledge and skills related to the business, but also a wide range of fields including law and accounting. By acquiring know-how while being involved in new businesses studies, I will strive to become an employee who can flexibly come up with ideas and promote new businesses persuasively.

【Before feasibility study】
Understanding local communities
Project identification / Survey planning
Around 80% of the locations where geothermal resources can be expected are located within national parks. Also, they are often located near hot spring areas. Therefore, communication with local communities is essential to protect the natural environment and coexist with local industries. We conduct a literature review, select promising sites, collect information, and develop a survey plan. We then evaluate the economic feasibility and begin to consider commercialization.

【Feasibility study phase】
Resource surveys (3 to 5 years)
Ground surface surveys
We conduct geological, geophysical, and other surveys in order to understand the subsurface structure.

Preparing roads and sites
We prepare roads and drilling sites for drilling test wells.

Drilling test wells
We actually drill wells to understand the detailed underground structure and confirm steam plumes.

Conducting environmental impact assessments
We conduct environmental impact assessments for projects with an output of 10,000 kW or more. We study, estimate, and evaluate environmental impacts, and disclose the results to the public.