Acknowledgement

"Echograms of aquatic organisms observed by a quantitative echosounder around JAPAN" was made corresponding to the request which came up from an inquiry conducted in 2008 spring, to all fisheries research institute existing in Japan. We first like to thank all the researchers who had posed their opinion on the inquiry. We express sincere thanks to the local fisheries reseach bodies in Hokkaido, Akita, Kanagawa, Tottori, Shimane, Tokushima and Oita prefecture, and Fisheries Research Agency, Institute of Cetacean Research. Also, many thanks to researchers of National Fisheries University, Graduate School of Agricultural and Life Sciences and the Faculty of Agriculture-The University of Tokyo，Field Science Center for Northern Biosphere-Hokkaido Universtiy, who have personally donated their data. Throughout the editing process, we had many advices and comments from Dr. Koki Abe，Dr. Kazuhiro Sadayasu，Dr. Tomohito Imaizumi (National Research Institute of Fisheries Engineering)，Dr. Kazuo Amakasu (Tokyo University of Marine Science and Technology)，Takeshi Nakamura (National Fihseries University), Hiroto Murase (Institute of Cetacean Research). We are also greatful to Dr. Masahiko Furusawa (Professor Emeritus at Tokyo University of Marine Science and Technology) who had contributed in revicing the part of "TS(Target Strength) Info.", "Basics of quantitative echosounder and echogram".

This project were founded by "Heisei 21 nenndo Nihonkaiku Kenkyujyo Kibankenkyu B" and "Wagakuni Shuhensuiiki Sigenchousa Suisin Itaku Jigyo"