Japan’s Deep-Sea Rare Earths: A Gamble or a Game-Changer?

Japan Explores Deep-Sea Mud for Critical Rare Earth Elements

TOKYO, JAPAN – In a move that highlights the global scramble for critical resources, Japan has initiated exploration of significant rare earth element (REE) deposits found in deep-sea mud off the coast of the Ogasawara Islands. The discovery, located in an area known as Minamitori Island (formerly Marcus Island), presents a potentially vast resource, but geopolitical analyst Peter Zeihan suggests that economic viability and global market dynamics make its immediate impact on production unlikely.

Understanding Rare Earth Elements

Rare earth elements are a group of 17 metals with unique properties crucial for modern technology, including smartphones, electric vehicles, wind turbines, and advanced defense systems. Despite their name, they are not exceptionally rare in the Earth’s crust, but extracting them in economically viable quantities is challenging. Typically, REEs are not mined directly; instead, they are extracted as byproducts from the mining of other minerals like iron, copper, or silver. The process is intensive, often involving the treatment of hundreds of tons of tailings with acid over several months to yield just a small quantity of REEs.

“Rare earths are not something we use in large volumes. Like your car probably has less than a tenth of a gram of the stuff in it. But that doesn’t mean it’s not critical. It changes the electrical properties of a lot of things.”

The Minamitori Island Deposit: Potential and Challenges

The deposit discovered near Minamitori Island reportedly contains concentrations of REEs ranging from 6,000 to 8,000 parts per million (ppm). While this concentration is noteworthy, Zeihan points out that it is significantly lower than some of the world’s richest rare earth mines. For context, the richest known REE mine in South Africa boasts concentrations approximately ten times higher, and the Mountain Pass mine in the United States is about four to five times richer. Even some Chinese clay deposits that have recently come online show higher concentrations.

However, the Minamitori Island deposit does present a unique characteristic: a near 50-50 split between light rare earth elements (LREEs) and heavy rare earth elements (HREEs). Most global deposits are skewed towards LREEs, while HREEs are generally scarcer and more valuable. This balanced composition could be a significant factor if the deposit proves economically extractable.

The Economic Hurdle: Cost and Infrastructure

The primary obstacle for the Minamitori Island project is its location and the associated extraction costs. Unlike terrestrial mines that can be accessed by road and exploited with conventional mining equipment, this deposit lies on the abyssal plain, approximately 8 kilometers (nearly 5 miles) underwater. The sheer logistical challenge of dredging the mud, transporting it, drying it, and then processing it means that the costs are likely to be an order of magnitude higher than any existing rare earth operation.

Zeihan estimates that for the Minamitori Island deposit to become economically viable, the global price of rare earth elements would need to increase not by a factor of two or three, but potentially by 50 to 100 times. Currently, there is little indication that such a price surge is imminent.

Global Rare Earth Market Dynamics

The global rare earth market is heavily influenced by processing capacity, which is currently dominated by China. While China accounts for a significant portion of global mining, its near-monopoly on the complex and environmentally sensitive processing stages gives it considerable leverage. Developing new mining sites is one challenge; establishing the necessary processing infrastructure is another, often more significant, hurdle.

While countries like the United States (with Mountain Pass), Australia, and Malaysia are working to build out their own processing capabilities, these efforts often depend on market prices that justify the investment. The Chinese have historically maintained a price point that discourages extensive investment in alternative processing facilities outside their control.

“The limiting factor is not not not the actual access to the ore. The limiting factor is the processing capacity which the Chinese basically have a lock on at the moment.”

Japan’s Strategic Imperative

Japan, a nation with limited domestic natural resources, is perennially seeking innovative ways to secure critical materials. Its push into exploring deep-sea resources is part of a broader strategy to reduce reliance on foreign supply chains, particularly for materials vital to its advanced manufacturing and technology sectors. The exploration efforts, even if they do not immediately yield commercial success, often drive technological advancements in efficiency and extraction techniques, as seen in Japan’s overall energy efficiency leadership.

The decision to pursue such high-cost, high-risk projects reflects Japan’s geographical constraints and its long-term strategic thinking, which often involves marrying national security needs with economic decision-making. If global powers begin to prioritize resource security over short-term economic considerations, the landscape for REE production could shift dramatically, potentially making projects like the one off Minamitori Island more feasible in the future.

What’s Next for Rare Earths?

The future of the Minamitori Island rare earth project hinges on several factors. The success of new processing facilities being built outside of China, potential geopolitical shifts that prioritize resource security, and the overall demand for rare earth elements in emerging technologies will all play a role. While the deep-sea mud off Japan may not be an immediate game-changer, it represents a continued effort by nations to diversify and secure vital supply chains for the technologies of tomorrow. Continued monitoring of global processing capacity expansion and strategic resource policies will be key to understanding the long-term implications of these deep-sea explorations.

Source: Finding Rare Earths in Japanese Mud || Peter Zeihan (YouTube)