Denshi Jōhō Gijutsu Sangyō Kyōkai

• Heisei 19-nendo "sho-ene-gata denki denshi kiki no fukyū ni kansuru chōsa" hōkokusho
• Heisei 19-nendo "sho-ene-gata denki denshi kiki no fukyū ni kansuru chōsa" hōkokusho
• Jōhō tsūshin kiki akuseshibiriti ni kansuru hyōjunka chōsa kenkyū