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Hiroyuki Sasai
Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan Japan Society for the Promotion of Science, Japan
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Yasutomi Katayama
Faculty of Education, Kogakkan University, Japan
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Yoshio Nakata
Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan
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Miki Eto
Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan
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Takehiko Tsujimoto
Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan
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Hiroyuki Ohkubo
Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan
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Kiyoji Tanaka
Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan