2003 年 9 巻 2 号 p. 157-161
Deepest Remotely Operated Vehicle ”Kaiko”, owned by Japan Marine Science and Technology Center (hereafter; JAMSTEC), had lost own vehicle during the research operation by the acci dent of snapping the secondary. JAMSTEC and other Japanese governmental organizations searched the missed vehicle as well as we could. However, it has been missing ever since. The search activities, which many Japanese organizations cooperated and carried out, arc summarized in this subject.