About OKADA HITOSHI
About 国立情報学研
About 情報通信学会誌
About information technology
About data structure
About hierarchical structure
About economy
About distributed processing
About game
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About Blockchain
About レギュレーション
About 仮想通貨
About industrial economy
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About Industrial economy
About Game thoery
About ブロックチェーン
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About 3層構造
About 仮説