A Japanese research team has successfully lifted seabed mud containing rare-earth elements from the Pacific Ocean floor during test mining operations [1, 2, 3].
The discovery is a strategic move to secure a domestic source of critical metals. This effort follows a period where China restricted rare-earth exports to Japan for at least four months [4, 5].
Using the deep-sea drilling vessel Chikyu, the team recovered sediment from the ocean floor near Minamitorishima [1, 2]. The island, also known as Minamitori Island, is Japan's easternmost territory and sits approximately 1,800 km south-east of Tokyo [2, 3].
Reports on the exact depth of the operation vary. One source said the mud was lifted from 5,700 meters below the surface [1], while another said the sediment was recovered from nearly 6,000 meters [2].
The scale of the find is significant. Some estimates suggest the rare-earth supply found at the site could potentially fuel the world for 700 years [2].
Japan has shifted its strategy to develop these deep-sea resources as a model for other nations, including the U.S. [5]. The move aims to stabilize the supply chain for electronics, and green technology, which rely heavily on these elements. The operation near Minamitorishima represents a critical step in transitioning from exploration to viable extraction [1, 3].
“The discovery is a strategic move to secure a domestic source of critical metals.”
This development signals a shift in global mineral geopolitics. By successfully extracting rare earths from extreme depths, Japan is attempting to break a strategic dependency on China, which has historically used export restrictions as diplomatic leverage. If the project scales, it could establish a blueprint for other industrialized nations to secure critical minerals through deep-sea mining, though it may also trigger new environmental and territorial disputes in international waters.
