At a depth of 6,000 meters, there turned out to be plenty of useful elements.
Japanese researchers are heading to the waters where they hope to extract rare earth elements from the seabed. This task is becoming particularly urgent in light of concerns about dwindling supplies of this raw material from China.
The vessel "Tikyū" has departed from Shimizu Port in Shizuoka Prefecture. It is heading to waters approximately 150 kilometers southeast of Minamitorishima Island within Japan's exclusive economic zone.
Scientists have found that the seabed, about 6,000 meters below the surface, has a very high concentration of rare earth elements. These minerals are vital for high-tech industries.
"Tikyū" is owned by the Japan Agency for Marine-Earth Science and Technology. The work is being conducted as part of a project overseen by the Cabinet Office.
Researchers plan to test newly developed pipes and extraction equipment for about 20 days. The return to port is scheduled for February 14.
Program director Ishi Shoichi expressed a desire to overcome technical difficulties after seven years of development.
China is tightening control over exports to Japan of what Beijing refers to as dual-use items, which have both civilian and military applications. There are concerns that these measures could also extend to rare earth metals.
Ishi noted that Japan must accelerate research and development to diversify supply sources.
