Keiichi Umada

1949

• Nichi-Bei keizai kankei
• Nihon no shin tsūshō senryaku
• Posuto tsūka kiki no keizaigaku
• Shinko koku no FTA to Nihon kigyo =
• Ajia Taiheiyō no shin tsūshō chitsujo
• Kenshō, APEC
• Kenshō, Higashi Ajia no chiiki shugi to Nihon
• Nichi-Bei keizai kankeiron
• Nihon kigyō to chokusetsu tōshi
• Nihon no tsūshō seisaku nyūmon
• Nihon tsūshō seisakuron
• Tsūshō seisaku no chōryū to Nihon