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Shusaku Yoshikawa
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Muneki Mitamura
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Takashi Uchiyama
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Yoshitaka Nagahashi
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Narumi Tsugeki
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Edy Sunardi
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Yasufumi Satoguchi
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Sadaki Hashimoto
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Iwao Yamamoto
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Satoshi Tanaka
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Hiroshi Yamazaki
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Takaharu Sato
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Hideyuki Ichikawa
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Author's Organization:Department of Geosiences,Fuculty of Science,Osaka City University Department of Geosiences,Fuculty of Science,Osaka City University Department of Geosiences,Fuculty of Science,Osaka City University Faculty of Education,Fukushima University The Institute of Freshwater Biology Department of Geology,University of Padjadjaran Lake Biwa Museum Dai-ichi High School attached to the Kansai University Hodaka-kita Primary School Kyoto University of Education Faculty of School Education,Hiroshima University Mikunigaoka High School,Sakai,Osaka Board of Education,Osaka-sayama City