*Ishikawa Kazuo¹, Sachihiko Itoh¹, Chikako Watanabe², Manabu Shimizu³, Tsutomu Tokeshi⁴, Nishiguchi Masaharu⁴, Daisuke Hashida⁵, Toshiyuki Ohkawa⁶, Shigeo Harada⁷, Makoto Okada⁸, Yuki Suzuki⁹, Syozo Takamura¹⁰, Ryousuke Fukumoto¹¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 3.Japan Fisheries Research and Education Agency, 4.Miyazaki Prefectural Fisheries Research Institute, 5.Fisheries Research Center, Ehime Research Institute of Agriculture, Forestry and Fisheries, 6.Kochi Prefectural Fisheries Experimental Station, 7.Wakayama Prefectural Fisheries Experimental Station, 8.Mie Prefecture Fisheries Research Institute, 9.Izu Branch, Shizuoka Prefectural Research Institute of Fishery, 10.Sagami Bay Experimental Station, Kanagawa Prefectural Fisheries Research Institute, 11.Kagoshima Prefectural Fisheries Technology and Development Center)

*Ishikawa Kazuo¹, Sachihiko Itoh¹, Chikako Watanabe², Manabu Shimizu³, Tsutomu Tokeshi⁴, Nishiguchi Masaharu⁴, Daisuke Hashida⁵, Toshiyuki Ohkawa⁶, Shigeo Harada⁷, Makoto Okada⁸, Yuki Suzuki⁹, Syozo Takamura¹⁰, Ryousuke Fukumoto¹¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 3.Japan Fisheries Research and Education Agency, 4.Miyazaki Prefectural Fisheries Research Institute, 5.Fisheries Research Center, Ehime Research Institute of Agriculture, Forestry and Fisheries, 6.Kochi Prefectural Fisheries Experimental Station, 7.Wakayama Prefectural Fisheries Experimental Station, 8.Mie Prefecture Fisheries Research Institute, 9.Izu Branch, Shizuoka Prefectural Research Institute of Fishery, 10.Sagami Bay Experimental Station, Kanagawa Prefectural Fisheries Research Institute, 11.Kagoshima Prefectural Fisheries Technology and Development Center)

*Yusuke Suganuma^1,2, Masaaki Okuda⁴, Makoto Okada³, Yuki Haneda³ (1.National institute of Polar Research, 2.SOKENDAI, 3.Ibaraki University, 4.Natural History Museum and Institute, Chiba)

*Yuki Haneda¹, Makoto Okada² (1.Graduate School of Science and Engineering, Ibaraki University, 2.Department of Earth Sciences, Faculty of Scinece, Ibaraki University)

*Masayuki Hyodo¹, Balazs Bradak¹, Makoto Okada², Shigehiro Katoh³, Ikuko Kitaba⁴ (1.Research Center for Inland Seas, Kobe University, 2.Department of Earth Sciences, Ibaraki University, 3.Hyogo Museum of Nature and Human Activities, 4.Research Centre for Palaeoclimatology, Ritsumeikan University)

*Makoto Okada¹, Yusuke Suganuma², Yuki Haneda³ (1.Department of Earth Sciences, Faculty of Science, Ibaraki University, 2.National Institute of Polar Research, 3.Graduate School of Science and Engineering, Ibaraki University)

*Masayuki Hyodo¹, Balazs Bradak¹, Makoto Okada², Shigehiro Katoh³, Ikuko Kitaba⁴ (1.Research Center for Inland Seas, Kobe University, 2.Department of Earth Sciences, Ibaraki University, 3.Hyogo Museum of Nature and Human Activities, 4.Research Centre for Palaeoclimatology, Ritsumeikan University)

*Makoto Okada¹, Yusuke Suganuma², Yuki Haneda³ (1.Department of Earth Sciences, Faculty of Science, Ibaraki University, 2.National Institute of Polar Research, 3.Graduate School of Science and Engineering, Ibaraki University)

*Yusuke Suganuma^1,2, Makoto Okada³, Yuki Haneda³, Kenji Horie^1,2 (1.National institute of Polar Research, 2.SOKENDAI, 3.Ibaraki University, 4.Chiba University)

*Konishi Takumi¹, Makoto Okada¹, Toru Maruoka¹ (1.Ibaraki University)

*Yuka Shimota¹, Makoto Okada² (1.Graduate School of Science and Engineering, Ibaraki University, 2.Department of Earth Science, Faculty of Science, Ibaraki University)

*Yuka Shimota¹, Makoto Okada² (1.Graduate School of Science and Engineering, Ibaraki University, 2.Department of Earth Science, Faculty of Science, Ibaraki University)

*Makoto Okada¹, Yusuke Suganuma², Yuki Haneda³ (1.Department of Earth Sciences, Faculty of Science, Ibaraki University, 2.National Institute of Polar Research, 3.Graduate School of Science and Engineering, Ibaraki University)

*Hasegawa Daisuke¹, Makoto Okada¹, Yuki Haneda², Yousuke Hiraoka¹ (1.Ibaraki University, 2.Graduate School of Science and Engineerring Ibaraki University)

*Koji Kameo¹, Yuki Haneda², Yoshimi Kubota³, Yusuke Suganuma⁴, Makoto Okada² (1.Department of Earth Sciences, Faculty of Science, Chiba University, 2.Graduate School of Science and Engineering, Ibaraki University, 3.National Museum of Nature and Science, 4.National institute of Polar Research)

*Makoto Okada¹, Yusuke Suganuma², Yuki Haneda³ (1.Department of Earth Sciences, Faculty of Science, Ibaraki University, 2.National Institute of Polar Research, 3.Graduate School of Science and Engineering, Ibaraki University)

*Hasegawa Daisuke¹, Makoto Okada¹, Yuki Haneda², Yousuke Hiraoka¹ (1.Ibaraki University, 2.Graduate School of Science and Engineerring Ibaraki University)

*Koji Kameo¹, Yuki Haneda², Yoshimi Kubota³, Yusuke Suganuma⁴, Makoto Okada² (1.Department of Earth Sciences, Faculty of Science, Chiba University, 2.Graduate School of Science and Engineering, Ibaraki University, 3.National Museum of Nature and Science, 4.National institute of Polar Research)

*Yoshimi Kubota¹, Yuki Haneda², Yusuke Suganuma³, Makoto Okada², Takuya Itaki⁴, Koji Kameo⁵, Hiroki Hayashi⁶ (1.National Museum of Nature and Science, 2.Ibaraki University, 3.National Institute of Polar Research, 4.Geological Survey of Japan, AIST, 5.Chiba University, 6.Shimane University)

*Yuki Haneda¹, Yusuke Suganuma², Yoshimi Kubota³, Makoto Okada⁴, Daisuke Hasegawa⁴, Yosuke Hiraoka⁴, Hiroomi Nakazato⁵ (1.Graduate School of Science and Engineering, Ibaraki University, 2.National Institute of Polar Reseach, 3.National Museum of Nature and Science, 4.Department of Earth Sciences, Faculty of Science, Ibaraki University, 5.National Agriculture and Food Research Organization)