*Osamu Kazaoka¹, Masaaki Uzawa², Itaru Ogitsu¹, Hisashi Yabusaki¹, Atsushi Kagawa¹, Takeshi Yoshida¹, Akiko Kato¹, Eri Honda¹, Takashi Ogura¹ (1.Research Institute of Environmental Geology, Chiba, 2.Kanto Construction Co. Ltd.)

*Yoshihiro Takeshita¹, Yasufumi Satoguchi², Hiroomi Nakazato³, Osamu Kazaoka⁴, Makoto Okada⁵, Nishida Naohisa⁶, Kentaro Izumi⁷, Takeshi Yoshida⁴, Kagawa Atsushi⁴, Itaru Ogitsu⁴, Yabusaki Hisashi⁴, Yusuke Suganuma⁸ (1.Shinshu University Faculty of Education, 2.Lake Biwa Museum, 3.National Institute for Rural Engineering, 4.Research Institute of Environmental Geology, 5.Ibaraki Univeristy, 6.Geological survery of Japan, AIST, 7.National Institute for Environmental Studies, 8.National Institute of Polar Research)

*Koyo Kumazawa¹, Masayuki Hyodo^1,2, Kotaro Hirose^1,2, Kosuke Tsumura¹, Shigehiro Katoh³, Osamu Kazaoka⁴, Itaru Ogitsu⁴, Hisashi Yabusaki⁴, Hiroki Hayashi⁵ (1.Department of Planetology, Kobe University, 2.Research Center for Inland Seas, Kobe University, 3.Hyogo Museum of Nature and Human Activities, 4.Research Institute of Environmental Geology, Chiba, 5.Shimane University)

*hisashi nirei¹, Osamu Kazaoka², Hideto Kimura³, Takeshi Yoshida², Hiroshi Fujita, Wataru Nirei⁴ (1.International Union of Geological Science for Environmental Management, 2.Research institute of Environmental Geology, Chiba, 3.Tohochisui Co., 4.Tokyo university of information science)

*Makoto Okada¹, Yusuke Suganuma^2,3, Yuki Haneda¹, Osamu Kazaoka⁴ (1.Department of Earth Sciences, College of Science, Ibaraki University, 2.National Institute of Polar Research, 3.Department of Polar Science, The Graduate University for Advanced Studies, 4.Research Institute of Environmental Geology)

*Osamu Kazaoka¹, Itaru Ogitsu¹, Hisashi Yabusaki¹, Eri Honda¹, Takeshi Yoshida¹, Syun Kameyama², Atsushi Kagawa¹, Masaaki Morisaki¹, Yoshihiro Takeshita³, Yasuhumi Satoguchi⁴, Yasuomi Nakazato⁵, Naohisa Nishida⁶, Makoto Okada⁷, Yusuke Suganuma⁸, Kentaro Izumi⁹, Hisao Kumai¹⁰, Hisashi Nirei¹¹ (1.Research Institute of Environmental Geology, Chiba, 2.Environmental Protection division of Chiba Prefectural Government, 3.Institute of Education, Shinshu University, 4.Lake Biwa Museum, 5.National Institute for Rural Engineering, 6.Geological Survey of Japan, AIST, 7.Ibaraki University, 8.National Institute of Polar Research, 9.National Institute for Environmental Studies, 10.Osaka City University, 11.Japan Branch of GEM-IUGS)