Hisakazu Usui

1940

• Heiwagaku
• Sekai seijigaku
• Shin kokusai seiji keizai chitsujo to Nichi-Bei kankei
• Chikyū kankyō to anzen hoshō
• Kankyō mondai to chikyū shakai
• Kokusai seiji no sekai
• Kokusai seiji no sekai
• Minsai gaikō no kenkyū
• Shinkokusaigaku
• Tenkanki sekai no rironteki wakugumi