About IWASAKI KATSUHIKO
About 嘉悦大 経営経済
About 嘉悦大学研究論集
About service industry
About profit
About productivity
About lodging facility
About quality control
About customer satisfaction
About management strategy
About analysis of profitability
About competitiveness
About service
About marketing
About competitive advantage
About making the thing
About Management engineering in general
About サービス
About 競争優位
About 収益