An active small basin structure along the back-arc basin of the Ryukyu arc in the northwest Pacific
Kohsaku Arai, Geological Survey of Japan, AIST, Tsukuba, Ibaraki, Japan, Takahiko Inoue, Geology and Geoinformation, Tsukuba, Ibaraki, Japan and Tomoyuki Sato, Geological Survey of Japan, AIST, Central 7, 1-1-1, Higashi, Tsukuba, Japan
