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*Akihiko Inamura
Geological Survey of Japan, AIST
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Masaya Yasuhara
Geological Survey of Japan, AIST
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Kohei Kazahaya
Geological Survey of Japan, AIST
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Masahiko Makino
Geological Survey of Japan, AIST
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Atushi Maekawa
Graduate student, Rissho Univ.
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Yuichi Suzuki
Rissho Univ.