*Nagisa YOSHIOKA¹, Atsushi WATANABE¹, Hajime TANAKA¹, Osamu MATSUDA ², Hiroshi TAKAGI³, Marlon de Luna ERA⁴, Riyanti DJALANTE⁵ (1. The Ocean Policy Research Institute, Sasakawa Peace Foundation, 2. Hiroshima University , 3. Tokyo Institute of Technology, 4. De La Salle University , 5. United Nations University )