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Yoichi Kumada
Kumada’s log-18:World economy(世界経済)
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Yoichi Kumada
Kumada’s log-17:Studying abroad(留学)
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Yoichi Kumada
Kumada’s log-16:Happy investment mind (投資)
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Yoichi Kumada
Kumada’s log-15:Importance of traveling(旅)
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Yoichi Kumada
Kumada’s log-14:Kumada’s negotiation scheme(交渉)
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Yoichi Kumada
Kumada’s log-13:Kumada’s Human stage theory (仕事)