Zenkoku Chūshō Kigyō Dantai Chūōkai (Japan)

• Chūshō kigyō chiiki shigen katsuyō sokushinhō katsuyō no tebiki
• Chūshō kourigyō ni okeru koyō rōdō tokusei to rōmu kanri ni kansuru chōsa kenkyū
• Sōritsu 30-shūnen kinenshi