日本海底稀土泥试采总指挥谈今后计划

Core Viewpoint - Rare earth elements have become a significant tool in international diplomacy, necessitating Japan to accelerate technological development despite economic feasibility concerns [2][11]. Group 1: Project Overview - The trial mining project near Minami-Torishima Island confirmed the operational status of equipment and the entire process from departure to return, with results to be applied in a large-scale demonstration test planned for February 2027 [5]. - The goal for the 2027 test is to verify a recovery capacity of approximately 350 tons of seabed mud per day, with expectations to potentially increase this target based on trial results [5]. - The trial also included environmental monitoring, with guidelines to be established based on these results for the upcoming large-scale test [6]. Group 2: Economic Assessment - Economic feasibility assessments will take time, and while it is important, the immediate focus is on accelerating technology development to ensure diversification of critical mineral supply [10]. - A comprehensive economic evaluation will be conducted by March 2028, considering the potential pricing of rare earths compared to other countries [10][12]. Group 3: Challenges and Considerations - The primary challenge in developing rare earth mud is the high transportation costs associated with mining at depths of 6,000 meters, approximately 2,000 kilometers from the Japanese mainland [14]. - Unexpected operational costs, such as the early depletion of food supplies for crew members, highlight the logistical challenges faced during the trial mining [14].