Yokohama Zeikan (Japan)

• Bōeki tōkei kara mita Yokohama-kō no hyakusanjūnen
• Ōsaka Zeikan enkakushi
• The outline of customs business, 1976
• Yokohama Zeikan gaikoku bōeki geppyō
• Zōho yunyūhin kaisetsu, zen
• [Shinsai zengo ni okeru hozei chiiki no fukkō jōkyō shirabe, Yokohama-kō hozei chiiki zaika tonryō shirabe, sono ta]