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Takashi Ito
Faculty of Education, Ibaraki University
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Takeyuki Ueki
Institute of Geology and Geoinformation, GSJ, AIST
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Hideyuki Nakano
Faculty of Education, Kyoto University of Education
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Yasushi Obi
Sagamihara Seiryo High School
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Yasuhiko Makino
Faculty of Education, Ibaraki University