Japan. Kankyōshō. Chikyū Kankyōkyoku. Sōmubu. Kokusai Kyōryokugakari

• Heisei 19-nendo kankyō to bōeki ni kansuru chōsa (bōeki jiyūka ni muketa kankyō senryaku) gyōmu hōkokusho
• Heisei 19-nendo kankyō to bōeki ni kansuru chōsa (bōeki jiyūka ni muketa kankyō senryaku) gyōmu hōkokusho
• Kankyō to bōeki ni kansuru chōsa (Higashi Ajia EPA to kankyō kyōryoku) gyōmu hōkokusho