About TSUBOTA KUNIO
About worker
About agricultural management
About labor force
About wage
About character (group theory)
About employ
About labor productivity
About action and behavior
About institution
About profitability
About foreign worker
About employment system
About profitability
About Population Dynamics
About manpower securement
About Agriculture in general
About Job and function management in general
About 外国人
About 農業
About 人材
About 受け入れ
About ポテンシャル