Nihon Kōshū Eisei Kyōkai

• "Kōreisha ni taisuru rōjin hoken jigyō no arikata ni kansuru chōsa kenkyū jigyō" hōkokusho
• Kaigo yobō jigyō no suishin ni kansuru chōsa kenkyū jigyō
• Minamatabyō ni kansuru sōgōteki chōsa shuhō no kaihatsu ni kansuru kenkyū
• Minamatabyō ni kansuru sōgōteki chōsa shuhō no kaihatsu ni kansuru kenkyū hōkokusho