Naval Sytstems Research Center
, Technical Research and Development Institute
, Ministry of Defense
, 2-2-1 Nakameguro, Meguro-Ku
, Tokyo 153-8630, Japan
Department of Ocean Technology, Policy and Environment
, Graduate School of Frontier Sciences
, Kibanto Bldg. 6E5
, Kashiwanoha 5-1-5
, Kashiwa-shi, Chiba 277-8561, Japan