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Hikari SHIMIZU
Graduate School of Dairy Sciences, Rakuno Gakuen University
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Tatsuya ANDO
Toyako Visitor Center/Volcano Science Museum
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Kimihito ATAKU
Faculty of Commerce, Otaru University of Commerce
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Osamu YOSHIDA
Graduate School of Dairy Sciences, Rakuno Gakuen University College of Agliculture, Food and Environment Scienses, Rakuno Gakuen University