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Yoshio YMAZAKI
Faculty of Education, Chiba University
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Noritsugu TAKAHASHI
Meisei University
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Nobuko KAKIUCHI
Attached Elementary School of Chiba University
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Kazuko TAKAHASHI
Machida Shiritsu Minami-daiichi Elementary School
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Kazuhiko MAMADA
School for the Visually Impaired, University of Tsukuba
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Hisakazu TANAKA
Faculty of Education, Chiba University