*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)

*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)