R&D themes
Theme 01
Development of Rare Earth Production Technology
In the EEZ waters of Minamitori-shima, Japan, there are valuable rare earth resources (rare earth mud) with potential for industrialization. Utilizing these resources can reduce dependence on specific countries for rare earth supply. We will continue to investigate the distribution and abundance of rare earth mud. Using the deep-sea exploration vessel "Chikyu," we plan to conduct tests for mining and refining rare earth mud at a depth of 6,000m. Continuous mining, dredging, and refining will provide data for deep-sea rare earth development. We aim to develop a consistent supply system for ore selection, refining, and productization, accelerating domestic rare earth production.
This initiative will offer new opportunities for technology transfer to Japanese private marine survey companies, contributing to the revitalization of domestic marine-related industries.
Theme 02
Development of an Environmental Impact Assessment System for Marine Environments
To develop the system, we will enhance environmental impact assessment methods using advanced technology, establish a data utilization scheme, and advance industrialization models and international deployment. We will develop monitoring technology that integrates biodiversity surveys, environmental measurements, marine monitoring, and long-term fixed-point observations, utilizing "Edokko No. 1" and AUVs for rapid wide-range surveys. In establishing a data utilization scheme, we will employ AI for data analysis and digitize marine environmental models.
For industrialization models and international deployment, we will create models based on data utilization in the private sector and marine environmental management. Results and technology will be disseminated through international seminars, conferences, and technical cooperation with Pacific island countries. These efforts aim to promote marine industry development and address various marine environmental issues.
Theme 03
Development of Marine Robotics Survey Technology
Efficient ocean monitoring using multiple autonomous underwater vehicles (AUVs) is crucial for deep-sea resource exploration and achieving the "30by30" goal of the Convention on Biological Diversity COP15. Effective AUV operations and wide-area monitoring require cooperative group control technology and system integration with "Edokko No. 1" and IoT-enabled deep-sea terminals.
Research focuses on two key technologies: 1) cooperative group control of multiple AUVs, and 2) deep-sea terminal docking for navigation-type AUVs. Both will be developed in phases by 2027, with ongoing testing and improvements aiming for social implementation.
Advancing IoT observation systems and device improvements will enable rapid acquisition of underwater data. Additionally, small, inexpensive AUVs will be designed, prototyped, and tested in real marine environments. Collaboration with universities and private companies will drive marine environment conservation and industry development.
Theme 04
Basic Research on Large-Scale CO₂ Storage and Fixation Technology Using Marine Basalt Formations
In this project, we will conduct basic research on CO2 storage and fixation technology using oceanic basalt formations to advance CCS projects and achieve carbon neutrality in Japan by 2050. We will focus on the Takuyo No. 5 Seamount in the EEZ of Minamitori-shima, conducting geological surveys to understand its internal structure and physical-chemical characteristics.
Laboratory experiments will verify changes in permeability and mechanical properties due to CO2 injection into basalt formations. We will also study optimal injection and mineral fixation technologies, and conduct simulations on CO2 storage and fixation.
Considering CO2 maritime transport and offshore injection systems, our goal is to establish the conceptual design of oceanic basalt CCS.
